Black Moon Rising by Julie Ann Walker

He’s an adrenaline junkie who doesn’t know when to quit. She’s an FBI agent who does everything by the book. Are they destined for disaster…or love?

Britt Rollins navigates a perilous world of covert missions and hidden truths. He loves the intrigue, adventure, and adrenaline that comes with a life lived in the shadows. But when his ex-con brother arrives on his doorstep with a smart, sexy fed hot on his heels, Britt’s murky world is in danger of being dragged into the light.
Julia O’Toole is good at two things: being a crackerjack FBI agent and dreaming about the brooding, blue-eyed hottie she met on a previous case. However, when the hunt for a runaway felon leads her to Black Knights Inc, she begins to suspect the reality of Britt Rollins is far more dangerous than any of her late-night fantasies.
Finding a way to clear his brother’s name is tough enough. But throw in staying one step ahead of Julia, and it’s safe to say Britt is facing his toughest challenge yet. Giving in to his desire for her feels inevitable. But keeping his brother alive is not—especially when he discovers the true danger to them both might be Julia herself…