Fatal Revenant Stephen R. Donaldson

The instant 
New York Times
 bestseller, and the return of the Thomas Covenant series- "a landmark fantasy saga."(
Entertainment Weekly
)

In the most eagerly-awaited literary sequel in years, Linden Avery, who loved Thomas Covenant and watched him die at the end of Book Six, has returned to the Land in search of her kidnapped son, Jeremiah. As Fatal Revenant begins, Linden watches from the battlements of Revelstone while the impossible happens-riding ahead of the hordes attacking Revelstone are Jeremiah and Covenant himself, apparently very much alive. But Covenant is strangely changed . . .