It’s like the internet but made of paper!
Noun

Singular: book
Plural: books

  1. A long document stored as data that is or will become a book; an e-book
  2. A collection of sheets of paper bound together to hinge at one edge, containing printed or written material, pictures, etc. If initially blank, commonly referred to as a notebook.
  3. A record of betting (from the use of a notebook to record what each person has bet).
    • I’m running a book on who is going to win the race.
  4. A convenient collection, in a form resembling a book, of small paper items for individual use.
    • a book of stamps
    • a book of raffle tickets
  5. A major division of a published work, larger than a chapter, commonly an academic publication or the Bible.
  6. The script of a musical.
  7. (usually in plural) Records of the accounts of a business.