The horrific killing of two young Edinburgh women in October 1977 sparked a nationwide manhunt that turned into one of Britain's longest and most famous murder investigations. In The World's End Murders, Tom Wood and David Johnston tell the story of two innocent young women, Helen Scott and Christine Eadie, and of the extraordinary commitment of the police enquiry over three decades that eventually led to the discovery of links to their deaths with Angus Sinclair, one of Scotland's most notorious murderers and sex offenders.

But this is not a gruesome tale of murder. It is a story of heroes - of the families of Helen and Christine who, with quiet dignity, have carried an unimaginable burden down the years, and of the police officers, the support staff and the scientists who persisted in their investigations and never gave up.

This edition has been fully updated to cover the sensational retrial of Angus Sinclair after he was acquitted in 2010. Angus Sinclair is the first person in Scottish legal history ever to have been tried for the same crime twice.