WENSLEY CLARKSON has closely investigated John Palmer and many of his criminal associates for the past 30 years through his books and TV documentaries about the British underworld. He's encountered Palmer and many of his friends and enemies, on both sides of the law, and Clarkson's research has included prison visits, surveillance operations, police raids and even post mortems. Clarkson and his family have received death threats from Palmer's associates and the author was recently approached by police detectives investigating the murder of Palmer. There is no-one else more qualified to tell this story. Clarkson's books - published in more than thirty countries - have sold almost two million copies. He has also written movie screenplays and made numerous TV documentaries in the UK, US and Spain. His true-crime books include biographies of John Palmer's criminal associate Kenneth Noye, ex-Great Train Robber Charlie Wilson and legendary south London criminal Jimmy Moody, and his 2016 book Sexy Beasts, about the Hatton Garden heist was nominated for a prestigious Crime Writer's Association Dagger award.