Blood and Eternity — Shira Anthony

Sequel to Blood and Ghosts
Blood: Book Three

Vampire hunter Adrien Gilbert never dreamed he'd fall for his prey or that his love, Nicolas Lambert, would give him the gift of immortality. But when a hunter bent on destroying the truce between vampires and hunters throws the gauntlet at Adrien's feet, Adrien must travel through time to save Nicolas, and with him, the entire vampire race.

The time has come to make a choice -- one they will live with for eternity. 

In this final installment in the Blood Trilogy, Adrien and Nicolas must face their greatest enemy in a deadly last confrontation. But to prevail, they'll need to master the enemies within. 

When Adrien awakens to a future he doesn't recognize, he faces an impossible decision: live a perfect life with Nicolas in a shattered world, or risk everything to repair a broken past. But before he can challenge vampire hunter Verel Pelletier, he must master the demon who lives in his own mind -- and learn to control his ability to travel through time. With Nicolas by his side, he prepares for a final battle against a powerful adversary who likes to play games with the past and future. 

But the price of ensuring a future for their loved ones may be an eternity spent alone.