M.J. Arlidge has worked in television for the last twenty years, specialising in high-end drama production, including prime-time crime serials Silent Witness, Torn, The Little House and, most recently, the hit ITV show Innocent. In 2015 his audiobook exclusive Six Degrees of Assassination was a number-one bestseller. His debut thriller, Eeny Meeny, was the UK's bestselling crime debut of 2014 and has been followed by ten more DI Helen Grace thrillers - all Sunday Times bestsellers.

Alex Khan has spent over a decade working in Information Systems Security for a number of government organisations, and is currently specialising in Terrorism Studies. A lifetime passion for writing was sparked by the encouraging words of an English Teacher in school, and eventually led to Alex successfully completing an MA in Creative Writing. His debut, UNTIL DEATH, was described by multi-million-copy bestselling Angela Marsons as 'brilliantly original'.