In 1998 the graveyards in the market town of Hyde had some unusual early-morning visitors. Greater Manchester Police were exhuming the bodies of the elderly patients o a local doctor. The doctor concerned had been their GP for 21 years and had a reputation as the best in the area. But Dr Harold Frederick Shipman was a serial killer. A public inquiry has spent nearly four years investigating Dr Shipman's crimes They have traced them back more than 30 years and calculated the number of murder he committed to be in the region of 260. As director of ITV's To Kill and Kill Again - Dr Shipman, Carole Peters was given unique access to the public inquiry's database and she has also conducted her own investigative research. Much of the fascinating material she uncovered did not make it to the final cut, and will appear in this book for the first time. Transcripts will reveal the doctor's arrogance during police interviews, while exclusively obtained prison letters provide a revealing insight into his mind. And with the help of criminal psychologists and those most closely involved in the case, this boo examines the clues and provides the answer to the question why? Why Shipman chos to kill and kill again.