The "Rain Wild Chronicles" is set in the Rain Wilds, an inhospitable swampy region encompassing the Rain Wild River. After centuries, following the disappearance of the Dragons and their Keepers, the Elderlings, together with their Magic, the Rain Wild River has become polluted, turning the waters acidic and deadly to the people of the Rain Wilds Forests. The river and its many tributaries have flooded, overflowing the previously fertile meadows and ancient forests, which are now a poisonous boggy swamp. The deadly acidic waters have forced the Rain Wild people to rebuild their cities and towns into the upper branches of the ancient monolithic trees of the Rain Wild Forests.
