Mysterious talk of quarks, spin and cats in boxes has given quantum physics a reputation as the scientific theory that no-one really understands. Yet, as highly respected science writer Alastair Rae explains in this fascinating introduction to the quantum world, the practical applications of quantum physics are all around us in everyday life. Were it not for quantum physics, computers would not function, kettles would not boil, and power stations would not heat our homes. With a minimum of mathmatics and an abundance of common sense, Rae offers a step by step guide to the basics of one of the most important theories of all time, explaining:

- Einstein, Heisenberg and Bohr: the great minds behind the great ideas

- Waves, particles and wave/particles: duality demystified

- Supercomputers and uncrackable codes; the quantum future.

Concluding with a tantalising insight into the philosophical problems, pitfalls and revolutionary potential of the new physics, this brilliantly accessible guide will provide the perfect introduction to quantum theory for readers of all backgrounds.

Alastair Rae is editor of /The European Journal of Physics/ and was, until his recent retirement, Reader in Quantum Physics at the University of Birmingham. His /Quantuum Mechanics/, now in its fourth edition, has become a standard undergraduate text on the subject, and his book on the philosophical implications of quantum theory, /Quantum Physics: Illusion or Reality?/, is in its second edition and has been translated into six different languages.