Blade’s End by J.C. Daniels

It’s all coming to a bitter end

Kit and her lover, Damon, the Alpha of the Southern Cat Clans, are hot on the trail of Madae, an ancient entity that has haunted Kit’s people through the ages, stealing and discarding bodies once she’s worn them out.
Kit was supposed to be the next target, but she proved to be tougher than Madae expected. As both an act of revenge and expediency, Madae went for the next nearest of kin, Kit’s cousin, Doyle.
Earth-shattering truths are revealed and secrets laid bare, including secrets that threaten the love between Kit and Damon, and their very lives.

They’re determined to find Madae and save Doyle. But will those secrets drive them apart? Will those secrets drive them mad? And when they find themselves confronting not one ancient evil, but two, will Kit and Damon be strong enough to save Doyle? Or will one of them pay the ultimate price?