"Real black magic calculus" is how Albert Einstein described quantum mechanics in a letter in 1925. Quantum mechanics is now rather more widely understood by physicists, but still many "outsiders" are unaware of what quantum mechanics is, how it has changed the course of development of physics and how it affects their everyday lives. This book gives a fascinating account of the evolution of the ideas and concepts of quantum theory and modern physics, written by an "insider" but aimed specifically at the general science reader. Many anecdotes from famous past physicists give an insight into their work and personalities. The many illustrations are an important and attractive feature of the book. Leonid Ponomarev is a leading theoretical physicist. His deep understanding of the subject is allied with his wide knowledge of history, literature and philosophy to produce this history of the development of modern physics and its impact on our lives.