A book is the set of sheets of paper, vellum, or other substance, handwritten or printed, placed in the order in which they are to be read, and which, when gathered or bound, form a volume. They can contain texts, images, drawings or music. The word book comes from the Latin liber , referring to the plant material from which books were made in ancient times. The term book is also called certain sets of works; for example, the various books of the Bible, etc. A book must have a certain number of pages to be considered as such, at least 50 pages, and must constitute a separate unit to distinguish itself from newspapers, magazines, brochures and other printed materials.
Books are one of the main and most accessible sources of information and knowledge for billions of people in the world. They have remained through the years, spreading the knowledge and history of Humanity. The content and usefulness of the books covers infinite extensions and themes; There are recreational (stories, novels, works, narrations, etc.), informative (scientific news, events), consultation (dictionaries, encyclopedias, atlases), scientific, educational, accounting, among others.
Almost all books have a cover, which is the cover of the book, and where the title of the work, the name of the author and the publisher appear; the prologue, presentation or introduction, is the short text where the content of the book is explained; followed by the index, and the content, which can include texts, drawings, photos, graphics, maps, etc. And finally, the bibliography or references.
Currently there are electronic or digital books known as e-books, which can be read on a computer, a PDA, a laptop, and in general any device that has a screen and memory. Are also the audiobook s are recordings of the contents of a book read aloud, and you can listen to any audio device. On the other hand, the term book is also referred to one of the four cavities of the stomach of ruminant mammals, specifically the third, this cavity is also called omasum or booklet .
