Dungeon Crawl Classics #109: Beneath the Isle of the Serpents by Bob Brinkman

This adventure for 2nd-level characters expands on the material presented in Caverns of Thracia. When islanders on the Starry Archipelago start going missing, the region teeters on the edge of warfare. It's up to the PCs to discover what lurks beneath the island and end its threat to the surface world.
Binding: Paperback / softback