Original sentence: Ravenloft's success led to a sequel in 1986 titled Ravenloft II: The House on Gryphon Hill
Edited sentence: In 1986, Ravenloft was adapted into the gamebook Master of Ravenloft, #6 in the Advanced Dungeons & Dragons Adventure Gamebooks series.In the book, the reader must defeat Count Strahd von Zarovich and save a young girl from becoming one of the undead.Ravenloft's success eventually led to a sequel in 1986 titled Ravenloft II: The House on Gryphon Hill.Two anniversary editions of the adventure have been released