Ravenloft II: The House on Gryphon Hill is a Dungeons & Dragons module, coded I10, written for use with the First Edition Advanced Dungeons & Dragons ruleset, by TSR. It is credited to husband-wife duo Tracy and Laura Hickman While following the Hickman's outline for the module, most of the writing was done by David "Zeb" Cook, Jeff Grubb, Harold Johnson and Douglas Niles, each working on their own section in order to meet a deadline. Clyde Caldwell, who had done all the art for the original Ravenloft, again provided the cover, but this time interior art was provided by Jeff Easley.