Scorched Ice — Erica Stevens

Julian will stop at nothing to keep Quinn safe from the vampires seeking to use her for her special abilities. Deciding that desperate times call for desperate measures, Julian sets a plan into motion that will force him to do something he's managed to avoid for five hundred years.
Willing to do what she must in order to find peace for her and Julian, Quinn agrees to go along with his plan. However, when an old enemy resurfaces, Quinn knows it will take everything she has to keep Julian from going over the edge.
Find out how it all ends in the conclusion to The Fire and Ice Series.