Quantum theory confronts us with bizarre paradoxes which contradict the logic of classical physics.At the subatomic level, one particle seems to know what the others are doing, and according to Heisenberg's "uncertainty principle", there is a limit on how accurately nature can be observed. And yet the theory is amazingly accurate and widely applied, explaining all of chemistry and most of physics.Introducing Quantum Theory takes us on a step-by-step tour with the key figures,