Aaron Rosenberg - Hour of the Daemon (Daemon Gates Trilogy, Book 3)

Alaric and Dietz have one last chance to track down the daemon and destroy it before it materialises and lays waste to the civilised world. This time, their journey takes them into the dark heart of the Grey Mountains, where they must face a savage horde of beastmen and their mutated ruler. Even with the help of their allies, the wood elves, how can our heroes ever hope to triumph against such impossible odds?