Blood of the Moon (Dark Moon, 3) by Marie Medina
Once Morgaine, the queen of the vampires, was dead, Gerard and his friends thought they would be safe. The vampires would go into hiding and forget about them. Despite being born into one of the most powerful vampire clans, Gerard had sided with the werewolves for over a year and managed to survive. He didn’t count on an old enemy returning from England with a powerful new ally. When someone precious is taken from him, he is pushed so far past his breaking point he and his adopted family realize just how far the war is from being over.