The Deryni Adventure Game and supplements are based on the popular "Deryni" series of fantasy books by New York Times best-selling author Katherine Kurtz.

The "Deryni" series began in 1970 with Deryni Rising. The novels weave a rich tapestry of romantic chivalry, medieval kings, a powerful Church, and a persecuted race of humans with the gift of magic - the Deryni.

A perennial favorite of fans of medieval fantasy, the Deryni setting offers roleplayers a rich world of magic and kings and high adventure.