Bookshelves are a kind of high furniture consisting of a few or several interconnected shelves. They are used to keep and exhibit books. Shelves are the necessary equipment of libraries and warehouses, where volumes are stored. Bookshelves are also often used in private homes, presenting a collection of favorite books of the household. If there is a bibliophile and the size of a room allows it, we can be sure that the bookshelves will occupy the entire wall and go up to the ceiling. Particular publications are usually arranged in accordance with a fixed key - alphabetically, in publishing series, eras, genres or collections of works of specific authors.