Arctic Sun by Annabeth Albert

Ex-military mountain man Griffin Barrett likes his solitude. It keeps him from falling back into old habits. Bad habits. He’s fought too hard for his sobriety to lose control now. However, his gig as a wildlife guide presents a new kind of temptation in superhot supermodel River Vale. Nothing the Alaskan wilderness has to offer has ever called to Griffin so badly. And that can only lead to trouble…

River has his own methods for coping. Chasing adventure means always moving forward. Nobody’s ever made him want to stand still—until Griffin. The rugged bush pilot is the very best kind of distraction, but the emotions he stirs up in River feel anything but casual, and he’s in no position to stay put.

With temptation lurking in close quarters, keeping even a shred of distance is a challenge neither’s willing to meet. And the closer Griffin gets to River, the easier it is to ignore every last reason he should run.