Ключевые слова: ancient, answers, antique, archives, backgrounds, book, book spine, bookshelf, brown, choice, collection, color image, concepts and ideas, education, encyclopedias, front view, group of objects, hardcover book, ideas, in a row, indoors, information, information medium, intelligence, knowledge, large group of objects, learning, library, lifestyle, literature, medicine and science, multicolor, no people, old, old fashioned, paper, paperback, rarity, science, science backgrounds, shelf, square, stack, studying, top secret, traditional culture, university, wisdom,