'an accessible account of gravity, black holes and the Universe … A refreshing alternative to the received wisdom.' New Scientist 'For readers who really want to get to grips with the concepts and don't mind a few simple equations (on the level of F=ma), Narlikar's exposition is masterly, a model of clarity and illumination. And it is enlivened wtih many interesting side-lights and touches of humour ... This book is not only full of insights, it is also fun.' Werner Israel, Physics World