Under His Enemy by Kiki Burrelli

When alpha shifter Orion accepts a mission that takes him behind enemy lines he expects to find hate. He never expects to find a mate.

Crow Brownstone’s family has known much loss from the hands of shifters. It is that loss that compels Crow’s father to create the Protectors of the Pure, an organization committed to protecting humans against shifters. Being a Protector comes with sacrifice. To be accepted, Crow lives in the closet, his true identity hidden from even his twin brother, Falcon. By now, Crow is used to it and he can always sneak out for a one-night stand.

Then, he meets the first man to ever make him doubt his one night only rule. Orion rocks Crow’s world, but he is just passing through. Or so he says. When Orion shows up as one of the newest recruits on the Protectors’ compound the next morning, Crow should be terrified, instead, he’s relieved that he doesn’t have to say goodbye yet.

Only Orion would potentially ruin a mission, months in the making, by unwittingly sleeping with one of the Protectors’ leaders. Orion is there to discover their latest weapon, but he can’t seem to stop worrying about the last man in his bed. With his inner animal on hiatus, Orion is flying blind. He can’t sense Crow is his mate, until their relationship has already changed Crow’s life in ways neither expected. Orion can’t leave his mate behind, even if he must take Crow from the only life he’s ever known.

While Orion tries to convince his pack to accept his new mate, Crow’s brother, Falcon, powered by the Protectors of the Pure, will stop at nothing to take him back.