2023: Textbooks and Reference

Textbooks and References are categories of books that contain educational, scientific, or professional materials that can be used as sources of learning, research, or self-development. Textbooks and Reference usually have a systematic, complete, and accurate format, and are compiled by experts in their fields. Textbooks and References can cover various topics, such as mathematics, physics, chemistry, biology, history, geography, language, literature, economics, law, psychology, sociology, philosophy, religion, art, music, technology, health, and others. Textbooks and References can be in the form of printed books and electronic books.