Undead Uprising. Villalobos Legacy, #1

Catalina de Villalobos is a wolf like no other, a wolf alone in her pack.  Next in line to be the head of the prosperous Villalobos clan, Catalina knows that her path to leadership is complicated by the unusual nature of her werewolf state and her love for a human, Ramon Santander, the pack's physician. Unlike the other Villalobos wolves, Catalina cannot control her wolf during her monthly transformation, but she is stronger than any other wolf in that state as well as in her human condition.  For that reason, Catalina hunts the vampires who kill humans almost every day of her life.  Only during her transformation is she free of that burden.  But when the wolf emerges during her lunar cycle, only pleasure-pain can help her keep the wolf at bay for a very short time until she morphs into a mindless animal.
As Catalina approaches her twenty-fifth birthday, she is facing a challenge to her leadership from within the pack, the threat of an undead uprising, and the possibility that her father will make her mate with whatever alpha male wins the Gauntlet, a dangerous contest designed to weed out the weak. Will Catalina fight off the challenges to her leadership and guide her pack in the battle against the vampires or will she sacrifice everything for the human she loves?