Stone of Farewell — Tad Williams

It is a time of darkness, dread, and ultimate testing for the realm of Osten Ard, for the wild magic and terrifying minions of the undead Sithi ruler, Ineluki the Storm King, are spreading their seemingly undefeatable evil across the kingdom. With the very land blighted by the power of Ineluki's wrath, the tattered remnants of a once-proud human army flee in search of a last sanctuary and rallying point--the Stone of Farewell, a place shrouded in my mystery and ancient sorrow.

And even as Prince Josua seeks to rally his scattered forces, Simon and the surviving members of the League of the Scroll are desperately struggling to fulfill missions which will take them from the fallen citadels of humans to the hidden mountain caves of the Qanux trolls...across strom-tormented waters to discover the truth behind an almost-forgotten legend...to the secret heartland of the Sithi, where the near-immortals must at last decide whether to ally with the race of men in a final war against those of their own blood...