A book (Latin liber), according to traditional understanding, is a collection of printed, written, painted or even blank sheets of paper or other suitable materials, which is bound and usually equipped with a cover or jacket.
There are different types of books. They can be divided according to the type of production (brochure, hardcover) or according to the content (encyclopedia, travel guide, novel, etc.). There are also numerous special cases (e.g. audio book, blank book, artist’s book). Even books from everyday life do not make the classification easier (cash book, guest book). In addition, there are a number of products that are printed and bound, but are not called books (calendars, magazines, etc.).
In the digital age, the term book has also been applied to electronic publications (e-book).