Chronicles of Khaldun: Isle of Anhak
The lost kingdom of Duvan’Ku is little known, lost to the mists of history. The only thing known to the party is that they may have had the Emerald Tome of the Devourer in their possession at some point.
Subsequently, they have discovered that they might be responsible for whatever horror occurred atop Mt. Deathfrost, although they have also discovered a fairy tale about them involving a long-slumbering princess. Which Duvan’Ku is the real one remains to be seen. (Or perhaps both are true — a once-grand kingdom now laboring under a terrible curse.)