Garry Kilworth made his debut with the short story 'Let's Go To Golgotha', which in 1974 won the Gollancz/Sunday Times Competition. Since then, he has had more than one hundred books published across various genres.

His novel Witchwater Country was longlisted for the Booker Prize, and he has twice been shortlisted for the prestigious Carnegie Medal for children's fiction. He has won a number of other awards, including a World Fantasy Award, a BSFA Award, the Lancashire Children's Book of the Year Award, a Locus Award, and the Charles Whiting Award for Literature. He was given a Fellowship in the Royal Geographical Society for the historical geography in his 18th-century war novels. His novelisation of Highlander is now considered a classic of the genre.