Matt Johnson served as a soldier and Metropolitan Police officer for twenty-five years. Blown off his feet at the London Baltic Exchange bombing in 1993, and one of the first police officers on the scene of the 1982 Regent's Park bombing, Matt was also at the Libyan People's Bureau shooting in 1984 where he escorted his mortally wounded friend and colleague, Yvonne Fletcher, to hospital. Hidden wounds took their toll.

In 1999, Matt was discharged from the police with Post Traumatic Stress Disorder. While undergoing treatment, he was encouraged by his counsellor to write about his career and his experience of murders, shootings and terrorism. One evening, Matt sat at his computer and started to weave these notes into a work of fiction that he described as having a tremendously cathartic effect on his own condition.

His bestselling thriller, Wicked Game, which was shortlisted for the CWA John Creasey Dagger, was the result. Deadly Game and now End Game, the final book in the Robert Finlay series, once again draw on Matt's experiences and drips with the same raw authenticity of its predecessor.