Mark Griffin began his writing career when he was a teenager, with three successive years of gold medal awards in the Hampshire Writing Festival. In 1996 he moved to Los Angeles, where he turned his attention to acting, script writing and development.

After returning to England, Mark continued in this profession, and in April 2017 was shortlisted in the top five out of 3500 entrants in a national crime thriller writing competition sponsored by Random House Publishing and the Daily Mail for his debut, When Darkness Calls.

When Darkness Calls is the first thriller starring criminal psychologist Holly Wakefield and it was longlisted for the CWA New Blood Dagger Award in 2019. When Angels Sleep is the second Holly Wakefield thriller.