Andrew Williams worked as a senior producer for the BBC's flagship Panorama and Newsnight programmes, and as a writer and director of history documentaries. He is the author of two bestselling non-fiction books, The Battle of the Atlantic and D-day to Berlin, and four acclaimed novels, The Interrogator, (shortlisted for the Ian Fleming Silver Dagger Award and the Ellis Peters Award), To Kill a Tsar, (shortlisted for the Ellis Peters Award and the Walter Scott Prize), The Poison Tide and The Suicide Club.