Feehan, Christine. Dark series

"Sarika Silva has come to Peru's rainforest to learn about her family's history and her own capabilities as a jaguar shapeshifter. What she finds is a dangerous world out of her nightmares, where jungle shifters and ravenous vampires vie for dominance and a gorgeous, lethal predator is waiting to claim her for his own. Tomas Smolnycki and his brothers have hunted vampires for centuries. As some of the oldest Carpathians, they are accustomed to seeing the world in unfeeling gray. So Tomas is ill prepared for the emotions that rise like a tidal wave when he hears Sarika's voice. As his world bursts into color, he knows he has finally found his lifemate--a woman he's compelled to protect whether she likes it or not. Despite an attraction to Tomas that defies logic, Sarika has no interest in being bound to anyone. But as an ancient enemy gathers power in the darkness, Carpathians and their lifemates from around the world must come together to fight back. And Tomas and Sarika's bond could be the one thing that will save them from total destruction..."--