From publisher blurb:
The southern seas of the Known Lands are home to a great many islands, some of which appear on no map. Given the treacherous nature of the seas, few of these islands are home to more than a handful of inhabitants, and most hold secrets that those on the mainland cannot even guess. Among these islands is the strange and nightmarish place known simply as Mystery Island.
Home to a massive swamp littered with the remains of virtually every airship ever deployed to try and map the area, Mystery Island is plagued with undead that seem to act with terrifying purpose, although what that purpose is remains unknown. The Cartographer's Society has vowed to recover the lost items of their crews that remain on the island and solve its mysteries once and for all... or die trying!