Horrors of the Dancing Gods | Jack L. Chalker
In this final volume of the Dancing Gods series, Ruddygore and his heroes must face an ancient evil seeping forth from the Sea of Dreams. Long dormant evil is rising to challenge reality as we know it and it will destroy Earth and the magical world of Husaguahr if left to its own devices. The Rules require the Great McGuffin to challenge and stop the evil forces, but McGuffini is lost in Hell and Ruddygore must, once again, depend on the skills Marge and Joe (and Joe's estranged son, Irving).