Albert Einstein called the first discoveries that launched quantum physics "spooky," as they suggested a random universe that seemed to violate the laws of common sense. Now bestselling author and physicist Stephen Hawking introduces the nonscientific reader to this fascinating and befuddling world. This collection gathers together the most important papers on quantum physics, including the scholarship of Niels Bohr, Max Planck, Werner Heisenberg, Max Born, Ervin Schrodinger, and Richard Feynman. This is the first time all of these important works have been together in one volumewith an introduction by today's greatest living scientist.