What is the third volume in Stephen Donaldson's "Thomas Covenant" series?

The Chronicles of Thomas Covenant is a series of ten high fantasy novels written by American author Stephen R. Donaldson. The series began as a trilogy, entitled The Chronicles of Thomas Covenant, the Unbeliever.

The Power that Preserves is a fantasy novel by American writer Stephen R. Donaldson, the final book of the first trilogy of The Chronicles of Thomas Covenant series. It is followed by The Wounded Land, which begins the second trilogy.

The Chronicles of Thomas Covenant, the Unbeliever:

1.Lord Foul's Bane (1977)

2.The Illearth War (1978)

3.The Power that Preserves (1979)

The story "Gilden-Fire" first appeared as an independent novella, but is most widely available as a part of most versions of the Donaldson short story collection, Daughter of Regals, 1985. It was set during the action of The Illearth War, and covers an episode from the doomed mission to contact the Giants. Gilden-Fire is told from the point of view of Korik, the senior Bloodguard on the mission. It describes Korik's selection of the mission's Bloodguard, then narrates the mission's passage through Grimmerdhore forest, where they defeat an ambush of ur-viles and kresh (wolves). The narrative ends as the mission leaves the forest.