book - a written work or composition that has been published (printed on pages bound together); "I am reading a good book on economics"

blue book - a blue-covered booklet used in universities for writing examinations

ticket book - a book of tickets that can be torn out and used

covering - an artifact that covers something else (usually to protect or shelter or conceal it)

file folder - folder that holds papers together in a filing cabinet

matchbook - a small folder of paper safety matches