For more than a decade, Liam Thomas worked as an undercover detective in the Metropolitan Police’s Covert Surveillance Unit, mixing with dangerous criminals and eventually investigating corrupt officers within his own force. A self-styled keeper of secrets, Liam believes he and his profession are recruited in childhood. His book, The Buyer is a gripping, self-reflective memoir and dramatic account of what it means to be on the inside and the outside at the same time.