A book is a set of written, printed, illustrated, or blank sheets, made of ink, paper, parchment, or other materials, fastened together to hinge at one side. A single sheet within a book is a leaf, and each side of a leaf is a page. A set of text-filled or illustrated pages produced in electronic format is known as an electronic book, or e-book. Ref : https://en.wikipedia.org/wiki/Book
Local description [ C ] a written text that can be published in printed orelectronic form: Have you read any good books recently? He has a new book out (= published). She wrote a book on car maintenance.