The Silence of Hell by Elizabeth N. Harris

He’s a Hellfire brother who loves his quietness and alone time. He’s happiest when at the clubhouse or work and doesn’t have to talk to people. Hell, he doesn’t even like talking to his brothers. But when he sees a car drive off the road, he stops to help and changes his fate.
Presented with a complete change of lifestyle, she’s out of depth and overwhelmed. Things she believed were true weren’t, and nothing makes much sense except for the gruff man who helped her. But he has a phobia she inadvertently triggers.
She is everything he is terrified of, and she has no idea how to combat his phobia. He wants her; he saved her, and that means she’s his. But how can he claim her when he’s petrified of her job? What she loves, he hates. And what about his heart? It had been broken once already.

A Hellfire brother has to overcome his phobia and his innate fear to save the woman he loves. Otherwise, he’ll be alone for the rest of his life, and that is unacceptable.