"...a delightful and instructive evocation of a remarkable human being by way of a judicious and documented passage downstream following the flow of modern physics." Scientific American "...an important, highly professional contribution to the history of quantum theory." Science "The entire biography is harmonic and a very interesting work created from previously unpublished documents." Physics in Canada "One of the valuable features of Kragh's fine if impersonal biography is that he dispels the myths surrounding Dirac and paints a portrait that clearly indicates Dirac's limitations without diminishing his greatness." Physics Today "This `scientific biography' should be widely read by physicists." Walter J. Moore, American Historical Review "The text has accounts of his life and extraordinary character with outlines of his achievements skilfully interwoven." N. Kemmer, Nature "...will be most appreciated by those readers already acquainted with the relevant physics and, moreover, something of its historical development." Peter R. Law, Mathematical Reviews