Queen of the Demonweb Pits

From the cover:

"An adventure for character level 10-14.

This module is the exciting conclusion of a series of seven AD&D modules. It may be played on its own or as the climax of the "Giant" series (G1, G2 and G3) and the "Drow" series (D1, D2, and D3). The persistent adventurers must now face the Demon Queen herself, and on her own plane!

The first of a new series of other-planar adventures, this module includes several new monsters, maps of the Web and lair of Lolth, and notes on eight alternate worlds, suitable for expansion and addition to existing AD&D campaigns."