Dr Gwen Adshead is one of Britain's leading forensic psychiatrists. She treats serial killers, gang members and other individuals who are usually labelled 'monsters'. Whatever their crime, she listens to their stories and helps them to better understand their terrible acts of violence. Here Adshead invites the reader to step with her into the room to meet twelve patients and discover how minds can change. 'The Devil You Know' will challenge everything you thought you knew about human nature.