Black holes have been the main object of astronomers’ curiosity since Stephen Hawking first postulated their existence. Some physicists think that black holes may lie at the rotational centre of certain galaxies, others see them as ‘corridors’ linking one universe to another. Yet so far no one has ever observed black holes, since they absorb all light surrounding them and are incapable of emitting rays of light themselves.This book sets out to define and observe black holes. The author is part of a team of researchers who constructed a gamma-ray telescope, which has been orbiting the earth in an effort to detect gamma-rays that may eventually escape from black holes. Written in the form of an adventure story, this is a humorous, entertaining book which should make black holes accessible to a wide audience.