His book The Genius of Science: A portrait gallery (Oxford University Press, 2000) contains biographies of seventeen distinguished physicists he had known personally: Niels Bohr, Max Born, Paul Dirac, Albert Einstein, Mitchell Feigenbaum, Res Jost, Oskar Klein, Hans Kramers, Tsung-Dao Lee and Chen Ning Yang, John von Neumann, Wolfgang Pauli, Isidor Isaac Rabi, Robert Serber, George Uhlenbeck, Victor Frederick Weisskopf, and Eugene Wigner.