Ключевые слова: background, book, bookstore, bright, collection, college, color, colourful, concept, cover, datum, design, document, education, group, hardcover, heap, information, isolated, knowledge, learn, library, literature, minimal, nobody, object, office, old, page, paper, pile, publication, reading, row, school, science, stack, study, text, textbook, university, wisdom, yellow,