nombre
Definición 1
Portable written or printed treatise filling a number of sheets fasted together and enclosed in a cover.
Fuente: Concise Oxford Dictionary
Contexto: The bookstacks surrounding it [the dome of the Reading Room of the British Museum] were also made of iron to take the great weight of the books and protect them against fire.
Fuente: www.britishmuseum.org
Definición 2
Back-hinged set of blank sheets for writing accounts, notes, exercises, etc.; in plural, merchant's accounts.
Fuente: Concise Oxford Dictionary
Contexto: The person who keeps the books, is someone who keeps a record of the expenses and income for a business.
Fuente: wiki.answers.com