Earth Logic: Elemental Logic Book 2

The destined ruler of Shaftal, Karis G'deon refuses the robe of power and lives in obscurity, until the Sainnite garrison at Watford is attacked by a troop of zealots, a mysterious and lethal plague is unleashed to destroy the Sainnites and Shaftali alike, and Karis must draw on all her powers to bring peace to the land, in the sequel to Fire Logic. Reprint.