Spencer. Campbell Agency, #5

This is the fifth and final book in the Campbell Agency series, with over 50, 000 words of romantic suspense. Sylvia Lyons is a freelance cartoonist who works in Jackson Square in the historical district of New Orleans. Her boyfriend, Ken, works as a security guard, but he doesn't tell her much more than that until the day he drags her from her caricature booth all the way to Campbell Agency where he proceeds to confess the fact that he's gotten in over his head with the worst criminal possible. Their unhealthy relationship explodes, and Sylvia commits to helping Campbell Agency clean up the mess Ken created.
When Spencer Nichols takes her under his personal protection, Sylvia is grateful, but both of them are wary of the intense connection between them and distracted by the threat on all of their lives. Spencer Nichols is ready for resolution in the case that has dominated the agency's attention for months. With inside sources suddenly crawling out of the woodwork, he feels hopeful that they'll soon get answers.
But he quickly discovers that keeping Sylvia Lyons safe is his first priority-something that comes as a shock to him. Something about the woman captivates him, but he's terrified to make the same mistakes his father made, and he's even more afraid of losing her to the maniac out to kill them all. In the end, they can only save each other.