Tunnel. Steel City Reapers MC, #18

She fixed engines. He moved through the dark. Nina Rosetti has spent five years keeping her father's garage alive-rebuilding carburetors, saving reputations, surviving on the same Beechview corner where the sign has read Rosetti's since 1984. When a weapons trafficker wants her tunnel access and she says no, the sabotage starts. Brake lines tampered. Steering loosened. Three decades of trust dismantled one "accident" at a time. Then they send a man to watch her every night.
Just so she knows what comes next. She's been proving herself her whole life. He's the first one who didn't need convincing. Tunnel is the Reapers' shadow-a lifetime mapping Pittsburgh's underground passages. He doesn't talk much. Doesn't need to. When he walks into a Beechview garage with a fake brake problem and finds a woman whose hands are honest and whose shop is under siege, he discovers something worth stepping into the light for. A woman who swings a torque wrench like a weapon.
A woman who reads an engine from twenty feet away. A woman worth killing in the dark for. She's done losing ground. He's done staying invisible. As the violence escalates and her father's legacy burns to ash, Nina discovers that the quiet man who came out of the tunnels to protect her is also the only one who sees her work before he sees her gender. But loving Tunnel means accepting his world-the brotherhood, the blood, and the claiming that makes her his. Two people who found each other in the dark.
Two hands that finally fit the same wrench. Some tunnels lead nowhere. She's where his leads.