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Millions believe in astrology. Science derides it. In Test Your Psychic Powers (Thorsons, £5.99, ISBN 1 85538 441 8), Susan Blackmore and Adam Hart Davis show that they know their occult onions. They offer many sensational tales and sensible commentary as well as many simple experiments which readers can do for themselves to see if they might be a second Uri Geller. There is an excellent tale here of a Toronto psychic group who invented a ghost who then came back to haunt them. Entertaining, intelligent and will do nothing to convince sceptics.