Abraham Pais is the author of the definitive biographies of Albert Einstein and Niels Bohr. Indeed, his biography of Einstein was the winner of the 1983 American Book Award and was selected by The New York Times Book Review as one of the Best Books of the Year. As a distinguished theoretical physicist who was a friend and colleague of Einstein and Bohr, Pais is able to blend a sophisticated understanding of physics with a first-hand knowledge of the...