My second attempt at making a module. This time a bit longer, 25 rooms, and for character levels 7th to 10th. I ran it with 7th, but that's using 1e rules and with pretty good gear (comparable to the stuff in GDQ).
As I didn't have any suitable color cover art, I took a B&W Dore illustration and colored it to look somewhat like the monochrome modules. I think it looks pretty neat.