From publisher's website:
Guidebook #4 takes you into the treacherous lands of Tahata Gaki, considered the most dangerous province in the Iron Dynasty. Explore the ancient, half-sunken ruins of cobwebbed swamps. Beware dangerous baku and dream eaters as you wend your way in search of lost treasures and, perhaps, a way to save this subjugated people. You'll find expanded information on Tahatan history, military structure and settlements, as well as new places of interest and more. Random encounter tables keyed specifically for the province, with all new people and creatures, fully immerse you into the setting more than ever before!