Castle Amber is a Dungeons & Dragons module, coded X2, designed by Tom Moldvay for use with the Expert D&D set. Castle Amber (Château d'Amberville) is actually one of several subtle literary adaptations among D&D modules, which draws from the Averoigne stories of Clark Ashton Smith. The main NPCs of the module, the Amber family, are not actually in any of Smith's stories, and were created by the designer to provide a link to Averoigne. A selected bibliography is included at the rear of the module.