The fourth edition of "General Chemistry: The Essential Concepts" continues the tradition of presenting only the material that is essential for a one-year general chemistry course. As before, the text includes all the core topics that are necessary for a solid foundation in general chemistry without sacrificing depth, clarity, or rigor. The fourth edition features new macro to micro art, 11 new animations correlated to the text, and the addition of hand sketched worked examples that are unique to Dr. Chang's texts. "General Chemistry: The Essential Concepts" is 200 to 300 pages shorter than traditional two-semester textbooks. Dr. Chang's concise-but-thorough approach will appeal to efficiency-minded instructors and will please value-conscious students.