I've got it, and, to be honest, it's fairly uninspired. The map is colourful, but lacks a scale or a grid

, the writing is pedestrian, and there isn't much about Rary, Robilar,
et al at all.
Most of the book centres on Father Eye and his duergar (hhiding on the edges of The Bright Desert) and the Scorpion Men living in the desert (remnant of a powerful civilisation, and hiding an artifact Rary is after).
Rary's tower is mapped, though the map of one level is missing.
It's pre-Sergeant Greyhawk, and lacks the energy and innovation of his
From the Ashes re-invention. One for Greyhawk completists

only, I fear.