The field of biochemistry has long felt the need of a textbook devoted to cellular biochemistry written in a form which is understandable to a student who has not yet had advanced biochemical training. This volume fulfils such a need in covering two broad subjects, enzymes and metabolism. The section on enzymes is readable, with emphasis on the main principles. A classification of enzymes and discussions of the nature of the individual biocatalysts is presented in a logical manner. The section on metabolism deals with nitrogen, fat, and carbohydrate metabolism, the discussion being correlated with enzymology. The author has purposely stressed the chemical aspects without emphasis on the clinical problems. The text is not well documented, and much of it is subject to changes as further advancements in biochemistry are made; nevertheless, it appears to offer a useful source of information for students of biochemistry.