From publisher blurb:
It's always stormy in the Vestruya Plains.
This regional supplement unveils a new realm of adventure. Brave ethereal storms, meet native factions, explore dangerous locations, and face new creatures in battle.
Chapter 1, “The Chuvari,” introduces a spiritual tribe with a sacred duty—protecting Geistcrown from those who would use its power malevolently. The spiritwalkers of the Chuvari are mages of great power, renowned for their connection with the spirit realm.
Chapter 2, “The Selgirs,” covers a faction of nomadic air genasi living on floating rocks. The Selgirs use gliders to travel long distances with ease, guide herds of beasts away from danger, and watch for incoming storms.
Chapter 3, “Geistcrown,” explores the site of an ancient calamity in which the storm elves vanished. The chapter includes two short adventures that can be used to learn of an age lost, and cross into the spirit realm.
The appendices include lore on ethereal storms and rules for using them in-game, as well as new magic items, spells, and creatures.