Graham Bartlett was a Sussex police officer for thirty years. In 1989 he was posted to Brighton and Hove, becoming a detective the following year. Quite uniquely he served the city through every rank, rising to become a homicide senior investigating officer and Detective Superintendent for Public Protection as well as a strategic firearms and public order commander. He then achieved his life's ambition, as Chief Superintendent, to become the city's Police Commander - or, as Peter James jokingly called him - the 'Sheriff of Brighton', a job he held and loved for four years. He pioneered Operation Reduction, the enduring approach to slashing drugs deaths and reducing crime as well as cutting disorder at protests by adopting methods developed by one of the world's foremost crowd psychologists. He lives in Sussex.

Peter James is the international bestselling author of many award-winning novels. His Detective Superintendent Roy Grace series, set in Brighton, has been translated into thirty-seven languages with worldwide sales of over eighteen million copies, and has given him nine consecutive Sunday Times number ones. In 2015 WHSmith customers publicly voted him the Greatest Crime Author of All Time and in 2016 he became the recipient of the coveted CWA Diamond Dagger lifetime achievement, awarded for sustained excellence. Peter has also written a short story collection, A Twist of the Knife, and his standalone titles include his ghost story The House On Cold Hill and The Perfect Murder, which has been turned into a smash hit stage play. All his novels reflect his deep interest in the world of the police. Three of his novels have been filmed and before becoming a full-time author he produced numerous films, including The Merchant of Venice, starring Al Pacino and Jeremy Irons. He divides his time between his homes in Notting Hill, London and near Brighton in Sussex.