Dennis was born in Manchester but went to school in Sandbach, Cheshire before eventually meeting his wife Beverly and having two sons who are both now grown up with families of their own. His early career was in hotel general management but he later moved to Yorkshire where he worked for 25 years as a senior executive at a large red-brick university
He currently lives in West Yorkshire with his wife but also spends time at their holiday cottage on the Llŷn Peninsula in North Wales, the area which inspired his debut novel, The Dragon’s Bloodstone.
Dennis was also inspired as a young boy by Alan Garner and his fantasy adventure books, The Weirdstone of Brisingamen and The Moon of Gomrath, set in Alderley Edge in Cheshire.