Acknowledgments

I owe a great debt to the numerous authors who over the years have sifted through the history of quantum mechanics in far more detail than I was able to, and whose work I have relied on enormously in writing my own account. I particularly acknowledge the efforts of Abraham Pais and David Cassidy. Of course they and others are not to be held responsible for any errors or idiosyncrasies in my version of history.

I could not have researched this book without the use of the Niels Bohr Library of the Center for History of Physics, at the American Institute of Physics in College Park, Maryland. Many thanks to the always helpful staff there. I am also grateful to have had easy access and helpful assistance from the Library of Congress, the libraries of the University of Maryland and George Mason University, and the Smithsonian’s Dibner Library of the History of Science and Technology at the National Mu-

seum of American History. (And thanks to Mary Jo Lazun for putting me on to that last one.)

I had an enjoyable and illuminating conversation about the EPR paper with Abner Shimony of Boston University. Ralph Cahn helped me out with some of the translation from German.

My agent, Susan Rabiner, encouraged (I might even say pushed) me to work out more clearly what this book was about before I started writing it, and without her help, as always, the project would never have got off the ground. The acute editorial eye of Charlie Conrad at Doubleday made the book slimmer, sharper, and more purposeful than it would otherwise have been. Many thanks to both.

For moral support, especially in the uncertain early stages of putting this project together, I thank Peggy Dillon.