Hellgate Keep
Unknown
Shadowrun: Artifacts Unbound
www.catalystgamelabs.com , www.shadowrun4.com
Advanced Dungeons & Dragons - Dungeon Masters Guide
Gary Gygax
Dragon Magazine #406
The Book of Three
Lloyd Alexander
Chronicles of Prydain (1)
The Castle of Llyr
Chronicles of Prydain (3)
The High King
Chronicles of Prydain (5)