Emmy is not your ordinary dog. When adopted from the shelter by physics professor Chad Orzel, she becomes immediately fascinated by his work. Could she use quantum tunnelling to get through the neighbour's fence? How about diffracting round a tree to catch squirrels? Or using virtual particles to catch bunnies made of cheese? In this international bestseller, Orzel explains the key theories of Quantum Physics, taking Emmy's anarchic behaviour as a starting point. From quarks and gluons to Heisenberg's uncertainty principle, this is a uniquely entertaining way to unlock the secrets of the universe.