'Contemporary research in computer science has produced an abundance of formal methods designed to enable hardware and software systems to reason correctly, and to enable us to reason better about these systems. Indeed, the explosion of research and specialised techniques can make it hard for students and newcomers to enter the field. John Harrison's Handbook of Practical Logic and Automated Reasoning is a significant addition to the expository literature on the subject, and will serve as a valuable resource for beginners and experts alike.' Theory and Practice of Logic Programming