James Herbert "Herbie" Brennan (born Ireland, 5 July 1940) is a lecturer and the author of over 100 fiction and non-fiction books for adults, teens, and children.
Brennan's Man, Myth & Magic was published by Yaquinto Publications in 1982; he had originally started developing it as a much smaller RPG called Arena, but the game continued to grow from its Roman has as he developed it. Brennan also designed Timeship, the last roleplaying game published by Yaquinto Publications. Brennan wrote several different gamebooks, including GrailQuest (1984-1987), a series of eight Arthurian adventures, and two published only in French - Aztec Quest (1997) and Egyptian Quest (1997).
His works have been translated into approximately 50 languages, he has also written books on the Occult and New Age. More recently, his teenage novel Faerie Wars achieved The New York Times best-seller status in the United States and is now part of a five book series. He initially trained in esoteric teachings and Qabalah with the Fraternity of the Inner Light. He later became associated with Dolores Ashcroft-Nowicki and the Servants of the Light.