The first novel in Gygax's Greyhawk setting is a good one. It is not perfect by any stretch of the imagination, but it is a fast and fun read. The story continues in Artifact of Evil, at which point Gary and TSR parted ways. He then took his Gord the Rogue series to another publisher and come out with Sea of Death, Come Endless Darkness and Dance of Demons. There is also a collection of short stories. TSR has published other Greyhawk novels, but none have been as good or fun as the Gord the Rogue series.