The Price of Eternity — Devyn Quinn

Forbidden scrolls lost for eight millennia threaten the existence of the three worlds.
Remembered only as legend, these writings gathered by an obscure sect of wizards were hidden because of the diabolical forces they could unleash from the netherworld. Lost for eight millennia, the resting place of the scrolls is accidentally discovered by Xavier D'Shagre. Wounded and dying, the sorcerer seeks to possess the writings to restore his waning magic. Revenge fires his hatred, lit by Morgan Saint-Evanston, the assassin who murdered Xavier's beloved wife, Nisidia.
Xavier vows he will not rest until his enemy is dead.
The sorcerer's search for the scrolls is discovered by an unlikely source: Julienne Blackthorne. Believed dead, her body was tossed into a charnel room. Alive amongst the reek of the battle dead, she seeks to escape her hellish incarceration. Time is against her, for she carries the embryo of a vampiric daemon that will consume her if it is not fed human blood. Julienne must escape Xavier's dungeons and find Morgan, her last hope for survival in the realm of Sclyd.