Gabriel King is a joint pseudonym used by authors Jane Johnson and M. John Harrison. Jane Johnson is a renowned British novelist and an expert on the works of J. R. R. Tolkien. She has worked as the editor in charge of Tolkien's line at George Allen & Unwin, Unwin Hyman, and later at HarperCollins, where she is also the editorial director of fiction. Jane has written under various pseudonyms, including Jude Fisher, under which she published the visual companions of Peter Jackson's film trilogy based on The Lord of the Rings.

M. John Harrison is a prominent author known for his works in the science fiction and fantasy genres. Together, as Gabriel King, they have created series such as Tag, the Cat and Knot Garden.