As a conceptual object, a book typically refers to a written work of substantial length, which may be distributed either physically or in digital forms like ebooks. These works are broadly classified into fiction (containing imaginary content) and non-fiction (containing content representing truths). Many smaller categories exist within these, such as children's literature meant to match the reading level and interests of children, or reference works that gather collections of non-fiction. Books are traded at both regular stores and specialized bookstores, and people can borrow them from libraries. The reception of books has led to a number of social consequences, including censorship.

A physical book does not need to contain written works: for example, it may contain only drawings, engravings, photographs, puzzles, or removable content like paper dolls. Physical books may be left empty to be used for writing or drawing, such as account books, appointment books, autograph books, notebooks, diaries and sketchbooks.

The contemporary book industry has seen several major changes due to new technologies. In some markets, the sale of printed books has decreased due to the increased use of eBooks. However, printed books still largely outsell eBooks, and many people have a preference for print. The 21st century has also seen a rapid rise in the popularity of audiobooks, which are recordings of books being read aloud. Additionally, awareness of the needs of people who can't access print media due to limitations like visual impairment has led to a rise in formats designed for greater accessibility, such as braille printing or formats supporting text-to-voice. Google Books estimated that as of 2010, approximately 130,000,000 unique books had been published.

Etymology

The word book comes from Old English bōc, which in turn comes from the Germanic root *bōk-, cognate to 'beech'. In Slavic languages like Russian, Bulgarian, Macedonian буква bukva—'letter' is cognate with 'beech'. In Russian, Serbian and Macedonian, the word букварь (bukvar') or буквар (bukvar) refers to a primary school textbook that helps young children master the techniques of reading and writing. It is thus conjectured that the earliest Indo-European writings may have been carved on beech wood. The Latin word codex, meaning a book in the modern sense (bound and with separate leaves), originally meant 'block of wood'.

An avid reader or collector of books is a bibliophile, or colloquially a "bookworm".

Definitions

In its modern incarnation, a physical book is typically a collection of pages (most commonly of paper, parchment, or vellum) that are bound together and protected by a cover. By extension, 'book' may refer to a physical book's written, printed, or graphic contents.

A single part or division of a longer written work may also be called a book, especially for some works composed in antiquity: each part of Aristotle's Physics, for example, is a book.

It is difficult to create an exact definition of books that clearly delineates them from other kinds of written material across time and culture. Many physical mediums for communication have existed throughout history, and the question of whether a particular object is a book may be subjective and contentious (as in the case of eBooks). Historian of books James Raven has suggested that when studying how books have been used to communicate, they should be defined in a broadly inclusive way as "portable, durable, replicable and legible" means of recording and disseminating information, rather than by physical or contextual features. This would include, for example, eBooks, newspapers, and quipus (a form of knot-based recording historically used by cultures in Andean South America), but not objects fixed in place such as inscribed monuments.

Stricter definitions appear in other specialized contexts. For the purpose of recording national statistics on book production, UNESCO recommended that a book be defined as "a non-periodical printed publication of at least 49 pages, exclusive of the cover pages, published in the country and made available to the public", distinguishing them from other written material such as pamphlets.

Although in academic language a monograph is understood to be a specialist work on a single subject, in library and information science the term is sometimes used more broadly to mean any non-serial publication complete in one volume (a physical book) or a definite number of volumes (such as a multi-volume novel), in contrast to serial or periodical publications.

History of books

The history of books became an acknowledged academic discipline in the 1980s. Contributions to the field have come from textual scholarship, codicology, bibliography, philology, palaeography, art history, social history and cultural history. Its key purpose is to demonstrate that the book as an object, not just the text contained within it, is a conduit of interaction between readers and words. Analysis of each component part of the book reveals its purpose, where and how it was kept, who read it, ideological and religious beliefs of the period, and whether readers interacted with the text within. Even a lack of evidence of this nature leaves valuable clues about the nature of that particular book.

The earliest forms of writing were etched on stone slabs, transitioning to palm leaves and papyrus in ancient times. Parchment and paper later emerged as important substrates for bookmaking, introducing greater durability and accessibility. Across regions like China, the Middle East, Europe, and South Asia, diverse methods of book production evolved. The Middle Ages saw the rise of illuminated manuscripts, intricately blending text and imagery, particularly during the Mughal era in South Asia under the patronage of rulers like Akbar and Shah Jahan. Prior to the invention of the printing press, made famous by the Gutenberg Bible, each text was a unique handcrafted valuable article, personalized through the design features incorporated by the scribe, owner, bookbinder, and illustrator.

The invention of the printing press in the 15th century marked a pivotal moment, revolutionizing book production. Innovations like movable type and steam-powered presses accelerated manufacturing processes and contributed to increased literacy rates. Copyright protection also emerged, securing authors' rights and shaping the publishing landscape. The Late Modern Period introduced chapbooks, catering to a wider range of readers, and mechanization of the printing process further enhanced efficiency.

The 20th century witnessed the advent of typewriters, computers, and desktop publishing, transforming document creation and printing. Digital advancements in the 21st century led to the rise of e-books, propelled by the popularity of e-readers and accessibility features. While discussions about the potential decline of physical books have surfaced, print media has proven remarkably resilient, continuing to thrive as a multi-billion dollar industry. Additionally, efforts to make literature more inclusive emerged, with the development of Braille for the visually impaired and the creation of spoken books, providing alternative ways for individuals to access and enjoy literature.

Notable advances

Tablet

Some of the earliest written records were made on tablets. Clay tablets (flattened pieces of clay impressed with a stylus) were used in the Ancient Near East throughout the Bronze Age and well into the Iron Age, especially for writing in cuneiform. Wax tablets (pieces of wood covered in a layer of wax) were used in classical antiquity and throughout the Middle Ages.

The custom of binding several wax tablets together (Roman pugillares) is a possible precursor of modern bound books. The etymology of the word codex (block of wood) suggests that it may have developed from wooden wax tablets.

Scroll

Scrolls made from papyrus were first used for writing in Ancient Egypt, perhaps as early as the First Dynasty, although the earliest evidence is from the account books of King Neferirkare Kakai of the Fifth Dynasty (about 2400 BC). According to Herodotus (History 5:58), the Phoenicians brought writing and papyrus to Greece around the 10th or 9th century BC. Whether made from papyrus, parchment, or paper, scrolls were the dominant writing medium in the Hellenistic, Roman, Chinese, Hebrew, and Macedonian cultures. The codex dominated in the Roman world by late antiquity, but scrolls persisted much longer in Asia.

Codex

The codex is the ancestor of the modern book, consisting of sheets of uniform size bound along one edge and typically held between two covers made of some more robust material. Isidore of Seville (died 636) explained the then-current relation between a codex, book, and scroll in his Etymologiae (VI.13): "A codex is composed of many books; a book is of one scroll. It is called codex by way of metaphor from the trunks (codex) of trees or vines, as if it were a wooden stock, because it contains in itself a multitude of books, as it were of branches".

The first written mention of the codex as a form of book is from Martial, in his Apophoreta CLXXXIV at the end of the first century, where he praises its compactness. However, the codex never gained much popularity in the pagan Hellenistic world, and only within the Christian community did it gain widespread use. This change happened gradually during the 3rd and 4th centuries, and the reasons for adopting the codex form of the book were several: the format was more economical than the scroll, as both sides of the writing material can be used; and it was portable, searchable, and easier to conceal. The Christian authors may also have wanted to distinguish their writings from the pagan and Judaic texts written on scrolls.

The codices of pre-Columbian Mesoamerica had the same form as the European codex, but were instead made with long folded strips of either fig bark (amatl) or plant fibers, often with a layer of whitewash applied before writing. New World codices were written as late as the 16th century (see Maya codices and Aztec codices). Those written before the Spanish conquests seem all to have been single long sheets folded concertina-style, sometimes written on both sides of the local amatl paper.

Manuscript

Manuscripts, handwritten and hand-copied documents, were the only form of writing before the invention and widespread adoption of print. Advances were made in the techniques used to create them.

In the early Western Roman Empire, monasteries continued Latin writing traditions related to Christianity, and the clergy were the predominant readers and copyists. The bookmaking process was long and laborious. They were usually written on parchment or vellum, writing surfaces made from processed animal skin. The parchment had to be prepared, then the unbound pages were planned and ruled with a blunt tool or lead, after which the text was written by a scribe, who usually left blank areas for illustration and rubrication. Finally, it was bound by a bookbinder.

Because of the difficulties involved in making and copying books, they were expensive and rare. Smaller monasteries usually had only a few dozen books. By the 9th century, larger collections held around 500 volumes and even at the end of the Middle Ages, the papal library in Avignon and Paris library of the Sorbonne held only around 2,000 volumes.

The rise of universities in the 13th century led to an increased demand for books, and a new system for copying appeared. The books were divided into unbound leaves (pecia), which were lent out to different copyists, so the speed of book production was considerably increased. The system was maintained by secular stationers guilds, which produced both religious and non-religious material.

In India bound manuscripts made of birch bark or palm leaf had existed since antiquity. The text in palm leaf manuscripts was inscribed with a knife pen on rectangular cut and cured palm leaf sheets; coloring was then applied to the surface and wiped off, leaving the ink in the incised grooves. Each sheet typically had a hole through which a string could pass, and with these the sheets were tied together with a string to bind like a book.

Woodblock printing

In woodblock printing, a relief image of an entire page is carved into blocks of wood, inked, and used to print copies of that page. It originated in the Han dynasty before 220 AD, used to print textiles and later paper, and was widely used throughout East Asia. The oldest dated book printed by this method is The Diamond Sutra (868 AD). The method (called woodcut when used in art) arrived in Europe in the early 14th century. Books (known as block-books), as well as playing-cards and religious pictures, began to be produced by this method. Creating an entire book was a painstaking process, requiring a hand-carved block for each page, and the wooden blocks could crack if stored for too long.

Movable type and incunabula

The Chinese inventor Bi Sheng made movable type of earthenware c. 1045, but there are no known surviving examples of his printing. Around 1450, Johannes Gutenberg independently invented movable type in Europe, along with innovations in casting the type based on a matrix and hand mould. This invention gradually made books less expensive to produce and more widely available. Early printed books, single sheets and images which were created before 1501 in Europe are known as incunables or incunabula.

19th century to 21st century

Steam-powered printing presses became popular in the early 19th century. These machines could print 1,100 sheets per hour, but workers could only set 2,000 letters per hour. monotype and linotype typesetting machines were introduced in the late 19th century. They could set more than 6,000 letters per hour and an entire line of type at once. There have been numerous improvements in the printing press. In mid-20th century, European book production had risen to over 200,000 titles per year.

Throughout the 20th century, libraries have faced an ever-increasing rate of publishing, sometimes called an information explosion. The advent of electronic publishing and the internet means that much new information is published online rather than in printed books, for example through a digital library. Though many books are produced digitally, most digital versions are not available to the public, and there is no decline in the rate of paper publishing. There have also been new developments in the process of publishing books. Technologies such as POD or "print on demand", which make it possible to print as few as one book at a time, have made self-publishing (and vanity publishing) much easier and more affordable. On-demand publishing has allowed publishers, by avoiding the high costs of warehousing, to keep low-selling books in print rather than declaring them out of print.

Contemporary publishing

Presently, books are often produced by a publishing company for the sake of being put on the market by distributors and bookstores. The company negotiates with authors in order to reach a formal legal agreement to obtain the copyright to works, then arranges for them to be produced and sold. The major steps of the publishing process are: editing and proofreading the work to be published; designing the printed book; manufacturing the books; and selling the book, including marketing and promotion. Each of these steps is usually taken on by third-party companies paid by the publisher. This is in contrast to self-publishing, where an author arranges to publish their work without the involvement of a publishing company.

English-language publishing is currently dominated by the so-called "Big Five" publishers: Penguin Random House, Hachette Book Group, HarperCollins, Simon and Schuster, and Macmillan Publishers. They were estimated to make up almost 60 percent of the market for general-readership books in 2021.

Design

Book design is the art of incorporating the content, style, format, design, and sequence of the various components and elements of a book into a coherent unit. In the words of renowned typographer Jan Tschichold (1902–1974), book design, "though largely forgotten today, [relies upon] methods and rules upon which it is impossible to improve, [and which] have been developed over centuries. To produce perfect books, these rules have to be brought back to life and applied". Richard Hendel describes book design as "an arcane subject", and refers to the need for a context to understand what that means.

Layout

Modern books are organized according to a particular format called the book's layout. Although there is great variation in layout, modern books tend to adhere to a set of rules with regard to what the parts of the layout are and what their content usually includes. A basic layout will include a front cover, a back cover and the book's content which is called its body copy or content pages. The front cover often bears the book's title (and subtitle, if any) and the name of its author or editor(s). The inside front cover page is usually left blank in both hardcover and paperback books. The next section, if present, is the book's front matter, which includes all textual material after the front cover but not part of the book's content such as a foreword, a dedication, a table of contents and publisher data such as the book's edition or printing number and place of publication. Between the body copy and the back cover goes the end matter which would include any indices, sets of tables, diagrams, glossaries or lists of cited works (though an edited book with several authors usually places cited works at the end of each authored chapter). The inside back cover page, like that inside the front cover, is usually blank. The back cover is the usual place for the book's ISBN and maybe a photograph of the author(s)/ editor(s), perhaps with a short introduction to them. Also here often appear plot summaries, barcodes and excerpted reviews of the book.

The body of the books is usually divided into parts, chapters, sections and sometimes subsections that are composed of at least a paragraph or more.

Illustration

The illustration of handwritten manuscript books was well established in ancient times, and the tradition of the illuminated manuscript thrived in the West until the invention of printing. Other parts of the world had comparable traditions, such as the Persian miniature. Woodblock printing emerged in China, spread to Japan by the 9th century, and spread across Europe in the 13th century. Modern book illustration comes from the 15th-century woodcut illustrations that were fairly rapidly included in early printed books, and later block books. Other techniques such as engraving, etching, and lithography expanded the possibilities and were notably used by the French artists Daumier, Doré, and Gavarni.

Manufacturing

The methods used for the printing and binding of books continued fundamentally unchanged from the 15th century into the early 20th century. While there was more mechanization, a book printer in 1900 still used movable metal type assembled into words, lines, and pages to create copies. Modern paper books are printed on paper designed specifically for printing. Traditionally, book papers are off-white or low-white papers (easier to read), are opaque to minimize the show-through of text from one side of the page to the other and are (usually) made to tighter caliper or thickness specifications, particularly for case-bound books. Different paper qualities are used depending on the type of book: Machine finished coated papers, woodfree uncoated papers, coated fine papers and special fine papers are common paper grades.

Today, the majority of books are printed by offset lithography. When a book is printed, the pages are laid out on the plate so that after the printed sheet is folded the pages will be in the correct sequence. Books tend to be manufactured nowadays in a few standard sizes. The sizes of books are usually specified as "trim size": the size of the page after the sheet has been folded and trimmed. The standard sizes result from sheet sizes (therefore machine sizes) which became popular 200 or 300 years ago, and have come to dominate the industry. British conventions in this regard prevail throughout the English-speaking world, except for the US. The European book manufacturing industry works to a completely different set of standards.

Printing

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Some books, particularly those with shorter runs (i.e. with fewer copies) will be printed on sheet-fed offset presses, but most books are now printed on web presses, which are fed by a continuous roll of paper, and can consequently print more copies in a shorter time. As the production line circulates, a complete "book" is collected together in one stack of pages, and another machine carries out the folding, pleating, and stitching of the pages into bundles of signatures (sections of pages) ready to go into the gathering line. The pages of a book are printed two at a time, not as one complete book. Excess numbers are printed to make up for any spoilage due to make-readies or test pages to assure final print quality.

A make-ready is the preparatory work carried out by the pressmen to get the printing press up to the required quality of impression. Included in make-ready is the time taken to mount the plate onto the machine, clean up any mess from the previous job, and get the press up to speed. As soon as the pressman decides that the printing is correct, all the make-ready sheets will be discarded, and the press will start making books. Similar make readies take place in the folding and binding areas, each involving spoilage of paper.

Digital printing

Recent developments in book manufacturing include the development of digital printing. Book pages are printed, in much the same way as an office copier works, using toner rather than ink. Each book is printed in one pass, not as separate signatures. Digital printing has permitted the manufacture of much smaller quantities than offset, in part because of the absence of make readies and of spoilage. Digital printing has opened up the possibility of print-on-demand, where no books are printed until after an order is received from a customer.

Binding

After the signatures are folded and gathered, they move into the bindery. In the middle of last century there were still many trade binders—stand-alone binding companies which did no printing, specializing in binding alone. At that time, because of the dominance of letterpress printing, typesetting and printing took place in one location, and binding in a different factory. When type was all metal, a typical book's worth of type would be bulky, fragile and heavy. The less it was moved in this condition the better: so printing would be carried out in the same location as the typesetting. Printed sheets on the other hand could easily be moved. Now, because of increasing computerization of preparing a book for the printer, the typesetting part of the job has flowed upstream, where it is done either by separately contracting companies working for the publisher, by the publishers themselves, or even by the authors. Mergers in the book manufacturing industry mean that it is now unusual to find a bindery which is not also involved in book printing (and vice versa).

If the book is a hardback its path through the bindery will involve more points of activity than if it is a paperback. Unsewn binding is now increasingly common. The signatures of a book can also be held together by "Smyth sewing" using needles, "McCain sewing", using drilled holes often used in schoolbook binding, or "notch binding", where gashes about an inch long are made at intervals through the fold in the spine of each signature. The rest of the binding process is similar in all instances. Sewn and notch bound books can be bound as either hardbacks or paperbacks.

Finishing

"Making cases" happens off-line and prior to the book's arrival at the binding line. In the most basic case-making, two pieces of cardboard are placed onto a glued piece of cloth with a space between them into which is glued a thinner board cut to the width of the spine of the book. The overlapping edges of the cloth (about 5/8" all round) are folded over the boards, and pressed down to adhere. After case-making the stack of cases will go to the foil stamping area for adding decorations and type.

Formats

For most of the history of book making, books have been shared as physical books. However, with changes of technologies and growing awareness of the needs of people who have reading disabilities, other formats such as audiobooks and digital books have gained traction in the book market place.

Physical books

Hardcover books have a stiff binding. Paperback books have cheaper, flexible covers which tend to be less durable. An alternative to paperback is the glossy cover, otherwise known as a dust cover, found on magazines, and comic books. Spiral-bound books are bound by spirals made of metal or plastic. Examples of spiral-bound books include teachers' manuals and puzzle books (crosswords, sudoku).

Publishers may produce low-cost, pre-publication copies known as galleys or 'bound proofs' for promotional purposes, such as generating reviews in advance of publication. Galleys are usually made as cheaply as possible, since they are not intended for sale.

Size

Dummy books

Dummy books (or faux books) are books that are designed to imitate a real book by appearance to deceive people, some books may be whole with empty pages, others may be hollow or in other cases, there may be a whole panel carved with spines which are then painted to look like books, titles of some books may also be fictitious.

There are many reasons to have dummy books on display such as; to allude visitors of the vast wealth of information in their possession and to inflate the owner's appearance of wealth, to conceal something, for shop displays or for decorative purposes.

In early 19th century at Gwrych Castle, North Wales, Lloyd Hesketh Bamford-Hesketh was known for his vast collection of books at his library, however, at the later part of that same century, the public became aware that parts of his library was a fabrication, dummy books were built and then locked behind glass doors to stop people from trying to access them, from this a proverb was born, "Like Hesky's library, all outside".

Ebook

Audiobook

Accessibility formats

Content

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Libraries, bookstores, and collections commonly divide books into fiction and non-fiction, though other types exist beyond this. Other books, which remain unpublished or are primarily published as part of different business functions (such as phone directories) may not be sold by bookstores or collected by libraries. Manuscripts, logbooks and other records may be classified and stored differently by special collections or archives.

Fiction

Many of the books published today are "fiction", meaning that they contain invented material, and are creative literature. Other literary forms such as poetry are included in the broad category. Most fiction is additionally categorized by literary form and genre.

The novel is the most common form of fiction book. Novels are stories that typically feature a plot, setting, themes and characters. Stories and narrative are not restricted to any topic; a novel can be whimsical, serious or controversial. The novel has had a tremendous impact on entertainment and publishing markets. A novella is a term sometimes used for fiction prose typically between 17,500 and 40,000 words, and a novelette between 7,500 and 17,500. A short story may be any length up to 10,000 words, but these word lengths vary.

Comic books or graphic novels are books in which the story is illustrated. The characters and narrators use speech or thought bubbles to express verbal language.

Non-fiction

Non-fiction books are in principle based on fact, on subjects such as history, politics, social and cultural issues, as well as autobiographies and memoirs. Nearly all academic literature is non-fiction. A reference book is a general type of non-fiction book which provides information as opposed to telling a story, essay, commentary, or otherwise supporting a point of view.