Książno [ˈkɕɔ̃ʐnɔ] is a village in the administrative district of Gmina Miłosław, within Września County, Greater Poland Voivodeship, in west-central Poland. It lies approximately 5 kilometres (3 mi) north of Miłosław, 12 km (7 mi) south-west of Września, and 42 km (26 mi) south-east of the regional capital Poznań.