Infernal Assassin by Drake Mason and Melissa Hawke

Dominic freaking Finch. Wizard first class, ex-army badass, and a terrific kisser. And now, the only obstacle in the way of completing my mission. Thanks to him, I’m not allowed to use my arsenal of enchanted weapons, as decreed by the magical governing body we both used to work for. I’ve spent the last year at the bottom of a bottle, holed up with a baby dragon and a very grumpy faerie. But if I can prove who was really behind the ritual that destroyed my sister, I might just get my life back. For Cat to live, someone has to die. Luckily, I’m great at killing people.