Ключевые слова: black, book, book isolated, book vector, design, dictionary, digital, document, e reader, education, element, encyclopedia, graphic, human, icon, illustration, information, knowledge, learn, library, literature, magazine, notebook, object, open, page, paper, pen, pencil, person, pictogram, publication, read, reader, reading, school, set, shape, sign, study, symbol, tablet, text, textbook, web,