The Forest of Ire (The 13th Paladin #9)

Success at last! Ahren and his companions have revived the alliance of the Jorathian peoples. But there is little time for celebration, for while the defensive ring around the Pall Cloud is being strengthened with Dwarfish assistance, Ahren and his friends are already on their way to answer the Wrath Elves' cry for help in the Forest of Ire, from within whose depths mysterious dangers are threatening to destroy the Elven forest and all life forms within it. Time is running out, and not only is the Pall Cloud spreading its noxious vapours over an ever-larger area, but the stricken Forest of Ire must be saved at all costs. If the forest falls, then the defensive ring will fall too, obliterating any hope of victory against HIM, WHO FORCES.