This book, written to accompany a TV series, is aimed at the interested layman. Winston attempts to explain the correlation of observed visual and mental effects with the reactions occurring in specific regions of the brain. Since these regions do not act independently of each other this is no easy task. He quotes widely from the experimental literature, showing scepticism of some experiments and conclusions, but also suggesting that there may be elements of truth in some \'old wives tales\'. It is not a light read, but well worth the effort. JPN.