David John James was born in Aberavon, Wales, studied philosophy at St David's University College, Lampeter, and also held an MA in psychology from Cambridge. In addition to writing historical novels he also worked for the Ministry of Defence and as a teacher. He is buried at Strata Florida Abbey in Wales.
Caitlin and John Matthews are the co-authors of the Encyclopedia of Celtic Wisdom and Encyclopedia of Celtic Myth and Legend. Caitlin is acknowledged as a world authoritiy on Celtic wisdom and the ancestral traditions of Britain, while John has produced nearly 100 books on Arthurian legend. They live in Oxford.