Frostborn: The Broken Mage - Frostborn, #8

RIDMARK ARBAN is the Gray Knight, exiled and outcast, seeking to stop the return of the dreaded Frostborn. At last he has come to the perilous ruins of Khald Azalar, where the answer to his quest awaits. Assuming the master of Khald Azalar does not kill him first. MORIGNA was the Witch of the Hills. Now the dark magic within Morigna threatens to devour her. Unless Morigna can tame the power, it will transform her into everything she has always hated.
MARA's father was a dark elven noble of terrible power. She escaped his grim realm, but now she must confront him once more, or join countless generations of his slaves in death. CALLIANDE has sought for answers since the day of the great omen heralding the return of the Frostborn. Her answers await in the darkness of Khald Azalar. But the truth might be more than she can bear...