Nomad by Lynn Hagen

Stanton grew up with cold and aloof parents. That’s why he loves hanging around his three best friends. But when they move out, leaving Stanton in the big house by himself, he’s completely miserable. Until one of the O’Brien men starts coming around. Stanton doesn’t know why Nomad is there, and the guy isn’t telling him, either. Desperate to make ends meet, Nomad offers a solution Stanton can’t resist. If only he knew what troubles the guy brought with him.

Six years ago Nomad was kidnapped and brutalized by some covert company who had found out that panther shifters existed. He only knew them as The Company. When he flees California after teaching his brother’s stalker a lesson, Nomad knows eyes were on him. He needs a place to lie low, so he starts hanging around Stanton’s home. Little did he know that Stanton is his mate, and that trouble is right on their heels.