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 guides the nonscientific reader through this fascinating and befuddling world. Along with his insightful introductory essays, Hawking has gathered 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 volume—all with commentary by today’s greatest living scientist.