A book is a set or collection of written, printed, illustrated, or blank sheets, made of paper, parchment, or other material, usually fastened together to hinge at one side. A single sheet within a book is called a leaf, and each side of a leaf is called http://www.discountphotogifts.com/photobooks.html a page. A book produced in electronic format is known as an e-book.

Many of the books published today are fictitious stories. They are in-part or completely untrue or fantasy. Historically, paper production was expensive; too expensive to be used for entertainment. An increase in global literacy and print technology led to the increased publication of books for the purpose of entertainment, and allegorical social commentary. Most fiction is additionally categorized by genre.