David spent more than fifteen years as a journalist, including seven years as a crime reporter with the Yorkshire Post - walking the Hull streets that would later become the setting for the Detective Sergeant Aector McAvoy novels.He has written eight novels in the McAvoy series: Dark Winter, Original Skin, Sorrow Bound, Taking Pity, Dead Pretty, Cruel Mercy, and Scorched Earth as well as two McAvoy ebook short stories, A Bad Death and Fire of Lies. Dark Winter was selected for the Harrogate New Blood panel and was a Richard & Judy pick and a Sunday Times bestseller. In 2018 it was adapted for the stage at the Hull Truck Theatre and had a sellout debut run. David has also written The Zealot's Bones, a historical crime novel published under the name D.M. Mark.He lives in the north of England with his family.