The game is based upon the fantasy novels Nine Princes in Amber (Doubleday 1970) and The Guns of Avalon (Doubleday 1972) by Roger Zelazny.
Grundlage des Spiels sind die Romane Nine Princes in Amber (Verlag Doubleday, 1970) und The Guns of Avalon (Verlag Doubleday, 1972) von Roger Zelazny.