Glenn began his writing career as a comics creator, devising the humour strip Temptation, and the autobiographical character Abe. His work appeared in cult UK magazines such as Escape and Deadline, and a collection of Temptation was published in 1991. He went on to work for Marvel Comics, writing for the superhero series Plasmer and Clan Destine. He also created the cartoon strip Robot Crusoe, which ran for eight years in the Funday Times.
