An undercover detective is a buyer, and their commodity is intelligence.But what is the real price of justice?'A compelling and powerful account from the darker side of policing and the terrifying impact it has on those who strive to keep us safe' Nazir AfzalLiam Thomas was an officer in the Met for over a decade, many of those years spent deep at the heart of Britain's most dangerous criminal enterprises in the murky world of undercover surveillance.Before him, his father had also been a police officer, a pillar of their small community. Fighting corruption was Liam's life. But the murky world of undercover work teaches him that justice is far from black and white - and a family secret reveals that corruption is closer to home than he had ever expected.The revelations push him to the edge of his sanity - and then he discovers that his bosses are investigating him... A thrilling memoir of a life lived amongst a world of corruption, justice and loyalties, this book tells the real story of the police's line of duty.