The history of physics since the discovery of X-rays would be too simplistic a description of this book. Certainly it covers the historical period from the late nineteenth century to the present day, but the book attempts to relate not only what has happened over the last hundred years or so, but why it happened the way it did, what it was like for those scientists involved, and how what, at the time, seemed a series of bizarre or unrelated events, now with hindsight presents a logical narrative. The author, himself a notable physicist and author of the highly successful Subtle is the Lord (Clarendon Press 1982), was personally involved in many of the developments described in the book. As with his previous book, unique insights into the world of big and small physics are to be gained from this major work.