Books are everywhere in the wizarding world. The students at Hogwarts spend a lot of time in the library doing research for their assignments, often using ancient and scholarly books of magic theory. Wizarding homes also have books in them, including cook books and books of household hints. Some books become best-sellers and their authors become celebrities; they do book signings at Flourish and Blott's in Diagon Alley.
other lists and resources
See also Wizard Communication for other print resources.