Dr. Jean-Pierre Luminet makes the subject of black holes accessible to any interested reader, who will need no mathematical background. The reader of this book will feel that the developments in modern astrophysics are as fascinating to discover and digest as the most fantastic science fiction novels. While answering such questions, the author takes us on a fabulous journey through space and time. We travel into the realms of supernovae, X-ray stars and quasars--a journey to the very edge of the universe and to the limits of contemporary physics.