Carelli has written the definitive account of the crime. A dizzying feat of investigative mastery, Carelli's book is built on hours of interviews with witnesses and family members, painstaking historical research, and most notably, correspondence with the killers themselves.

Brilliantly written, annoyingly good.' 5* reader review'I am obsessed.' 5* reader review'Both shocking and darkly funny, this razor-sharp debut is unlike anything I've read before.' 5* reader review'I loved this, properly loved it!!' 5* reader review'Left me both in awe and totally disturbed.