`A highly original and engaging account of the most important theory in science.' Jim Al-Khalili `Jim Baggott's survey of the history of the emergence of the twentieth century's most enigmatic but successful theory is a delight to read. It is clear, accessible, engaging, informative, and thorough. It illuminates an important, revolutionary era of modern science and the varied personalities behind it.' Peter Atkins `[A] wonderful histiry of the scientists and ideas behind quantum mechanics... The basic history behind the quantum revolution is well known, but no one has told it in quite such a compellingly human and thematically seamless way.' Publishers Weekly `Jim Baggott's inspired -- and inspiring -- idea of presenting the history of quantum physics in terms of 40 key moments works both an an introduction for the uninitiated and as a refresher for anyone who thinks they know the story. Even familiar stories come up fresh in these juxtapositions. Great to dip in to!' John Gribbin