MIT professors Catherine Drennan and Dr. Elizabeth Vogel Taylor chose Chemical Principles as the foundation for Principles of Chemical Science, their fantastic 100-level course available online through MIT Open Courseware. As textbooks go, Chemical Principles follows a logical progression, has lucid explanations and offers several kinds of reinforcement for ideas. It is a competent and authoritative introduction to modern chemistry, to which the professors at MIT give life and color. The two together make an engaging refresher in chemical theory.