For years London gangster Guy Stanton operated at the top of the drugs trade, moving huge shipments around the world. Yet all along he was living a perilous double life - 'Stanton' was the fake identity of a covert investigator in deep infiltration as part of Britain's most secret undercover unit. Their clandestine exploits have never been revealed - until now. The Betrayer is the authentic account of a ground-breaking assault on the world's most brutal narcos and of the courage, camaraderie (and humour) of the men and women who took the War on Drugs deep into the heart of the enemy.