In a single work of colossal scope one of the world’s greatest scientists has given us a complete and unrivalled guide to the glories of the universe. The Road to Reality is the most important and ambitious work of science for a generation. It provides nothing less than a comprehensive account of the physical universe and the essentials of its underlying mathematical theory. It assumes no particular specialist knowledge on the part of the reader — for example, the early chapters give us the vital mathematical background to the physical theories explored later in the book. Roger Penrose’s purpose is to describe as clearly as possible our present understanding of the universe and to convey a feeling for its deep beauty and philosophical implications, as well as its intricate logical interconnections. Rarely less than challenging, the book is leavened by vivid descriptive passages, as well as hundreds of hand-drawn diagrams.