Book excerpt: Published a few years after the author's death, this volume is a sequel to his 1964 book, Fast Reactions in Solution; the material is entirely new, extending investigation beyond now well-established fast-reaction techniques to consider their contribution to understanding events on the molecular scale. After an introductory chapter on origins, methods, mechanisms, and rate constants, coverage includes the rates of diffusion-controlled reactions, mathematical theory of diffusion, flash photolysis techniques, fluorescence quenching, Marcus theory involving proton-transfer and group-transfer reactions in solutions, and electron-transfer reactions. Annotation copyrighted by Book News, Inc., Portland, OR.