Quantum theory is one of science’s most thrilling, challenging and even mysterious areas.

Scientists such as Planck, Einstein, Bohr, Heisenberg and Schrödinger uncovered bizarre paradoxes in the early 20th century that seemed to destroy the fundamental assumptions of ‘classical physics’ – the basic laws we are taught in school. At the sub-atomic 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 quantum theory explanations are amazingly accurate and widely applied, explaining all of chemistry and most of physics.

Introducing Quantum Theory is a step-by-step tour, tackling the puzzle of the wave-particle duality, along with the two famous questions raised against Bohr’s ‘Copenhagen Interpretation’ – the ‘dead and alive cat’ and the EPR paradox, both of which remain unresolved even now.

Notoriously difficult, quantum theory is nonetheless an amazing and inspiring intellectual adventure, explained here with patience, wit and clarity.