Phantasia

Darksword Adventures is a book by Margaret Weis and Tracy Hickman that was published by Bantam/Spectra in 1988. It describes the world of Thimhallen, the setting the Darksword trilogy written by Weis and Hickman. Most of the book describes the world and its history. The final chapter, "Phantasia", describes a fantasy role-playing game that is set in Thimhallen.