Untamed Instincts by Lynn Hagen

Noah never imagined his life would spiral out of control over one desperate decision. Loan sharks, dangerous threats, and a run-in with the worst of the preternatural world weren’t on his agenda. But when his life is thrown into chaos, Noah finds himself face to face with the one person who can protect him—a powerful bear shifter who makes Noah’s heart race and his body ache for more.
Quinton never expected to find his mate in a human with a knack for getting into trouble. But from the moment he caught Noah’s scent, he knew they were destined. Now, with enemies closing in and his bear roaring to claim its mate, Quinton is ready to protect Noah at any cost. He’ll crush anyone who dares to threaten what’s his—even if that means breaking down Noah’s walls to reveal the vulnerable heart beneath.