Rides A Dread Legion by Raymond E. Feist

Set ten years after the events portrayed in Wrath of a Mad God, the book introduces yet another cataclysmic threat to Midkemia. A lost tribe of elves, the taredhel or people of the stars, are facing annihilation by a demon horde. Just in time, they find a way back to the place they consider to be...
Sat, Aug 1 |  from SF Site