Wicked Cowboy Wolf by Kait Ballenger

To his enemies, he’s known as the Rogue. To her, he’s her only chance at survival…

Years ago, Grey Wolf Jared Black was cast from the pack for a crime he didn’t commit. Now, he’s the mysterious criminal wolf known only as the Rogue, a name his former packmates won’t soon forget. But when a vampire threat endangers the lives of their entire species, Jared must confront his former packmates again, even if that means betraying the only woman he’s ever loved…
Ever since Maeve Gray escaped the pack’s bloodsucking enemies, she’s been determined to save her species—and fast. Each passing day risks the lives of her friends and family. But when a wicked cowboy wolf shows up on the Grey Wolf ranch, offering everything Maeve’s heart desires, her eyes are opened to a whole new world beyond the packlands. For this cowgirl, sleeping with the enemy could prove as desirable as it is deadly…