With his characteristic eyebrow-raising behavior, Richard P. Feynman once provoked the wife of a Princeton dean to remark, "Surely you're joking, Mr. Feynman!" But the many scientific and personal achievements of this Nobel Prize-winning physicist are no laughing matter. In addition to solving the mystery of liquid helium, Feynman has been commissioned to paint a naked female toreador and asked to crack the uncrackable safes guarding the atomic bomb's most critical secrets. He has traded ideas with Einstein and Bohr, discussed gambling odds with Nick the Greek, and accompanied a ballet on the bongo drums. Here, woven with his scintillating views on modern science, Feynman relates the defining moments of his accomplished life.