Enigma (Unearthly Paradox Book 4)

Half-breeds are a delicacy, and those in charge will do anything to stop the Lomazzos from ending their reign and the chance of owning a half-breed of their own. 

Lives will be lost, and others used as bait; the Lomazzos will discover a secret that none of them saw coming—A secret that might be the end of Zara and Jett, or might be the very thing that gives them the ability to cripple the alien species.