Good (Auto)Biographies of von Neumann and other physicists/mathematicians Which is the "best" biography of von Neumann available to the casual reader (math undergrad)? Also, other than the Ulam book, which other good biographies of physicists/mathematicians can be recommended? 

A bit of a meta-answer: for biographical searches on mathematicians, a very good way it to visit the Mathematical Biographies maintained by University of St Andrews, find the guy, scroll to the bottom, and click on the link to the list of bibliographic references. 
