Ключевые слова: background, book, book spine, bookshop, business, campus, celebration, club, cognition, collection, college, copy space, cover, design, document, education, group, hardcover, hobby, information, interesting, learning, library, light, literary, literature, multiple, no people, open, open book, page, paper, read, red, red background, research, school, science, selective focus, shadow, stack, study, text, textbook, top view, wisdom,