Hunger's Mate — A.C. Arthur

Half man, half animal, a Shadow Shifter must walk the line between predator and prey, hunger and obsession -- to capture the woman he loves…

A natural born hunter proud of his birthright, Ezra Preston agrees to hide his identity and pretend to be human -- to learn what his enemies know of his kind. But even undercover, it's not in his nature to play games with a woman. Especially when he discovers the beautiful creature has been keeping secrets of her own…
This is no ordinary woman he's stalking but an alluring and mysterious cat thief -- with dangerous secrets of her own…

Jewel Jenner has plotted and schemed for months, hiding her knowledge of a top-secret operation to save her ailing father. Captivated by her passion, skill, and courage, Ezra wants to help Jewel on her mission. But when he discovers how far she's gone -- sleeping with the enemy to steal a fortune in diamonds -- he must decide if he can trust this enthralling woman with his secret…or trust his fiercest instincts when he's near her.