A3: Assault on the Aerie of the Slave Lords (1981)

From the web:

The third in a series of modules based on the tournament at GenCon XIII. This module is for characters level four through seven. The characters pursue the slavers into the Drachengrab Mountains and to the Isle of the Slave Lords. There they must quickly make their way through the caves and into the hidden city to attack.

The booklet for this adventure actually contains 32 pages. The middle four pages (a two-sheet spread) is meant to be removed during play and does not have page numbers; the remainder of the booklet is numbered 1-28.

The insert has one DM and one player map and two blank pages for notes.