A book is a series of handwritten or printed word or picture paper, tied or glued together on one side. A sheet in a book is called a page. Electronic books are called e-books or e-books.
Books containing spiritual cultural values (works composed or compiled) of different social and artistic forms of consciousness, recorded in different languages (written, images, sounds, symbols, …) of different ethnic groups to store, accumulate and propagate in society.
Book is an open concept, book form is also changed and constitutes different forms according to the different methods of manipulation and duplication, depending on the living environment and the development of science and technology in each age.
Books can be sold at bookstores or borrowed from libraries. Google estimates that approximately 130 million different titles have been published by 2010. In some developed countries, the number of printed paper books has been lower than the number of e-books, although the number of e-books has decreased in the first half of 2015.
