Inspired at an impressionable age by the work of science fiction writers H.G. Wells and Arthur C. Clarke, Paul Davies has thought long and hard about ways to travel in time.

Here, the best-selling popular science writer finally reveals how it can be done - without breaking the laws of physics and without causing any earth-shattering paradoxes. Since time is money, time travel is a costly business. But with the help of a handy black hole, or better a wormhole, and a bit of luck, Davies's guide illustrates how this new mode of travel could yet be a viable option.

"An entertaining tour around a fascinating topic, conducted by a world-class physicist" - SUNDAY TELEGRAPH