In the Line of Duty7 books in series
His Obsession Next Door Publisher's Summary
Once the fuse is lit, there's only one way to extinguish the flames.
Cole Sullivan made a battlefield promise to his best friend to take care of his little sister, but that vow, given to a dying man, has pushed the woman he's wanted for years even farther from reach.
Gemma Mathews has crushed hard on the darkly handsome, far-to-serious explosives expert since she was a teen, but the sting of his rejection is as fresh as if it happened yesterday. Now, 10 years later, Cole stubbornly adheres to the role of protector, but when she catches him watching her from his house next door, she boldly takes the opportunity to show him everything he's been missing.
Cole's rule of look-but-don't-touch is shot to hell when he sees Gemma's bedroom window performance. He's never been a risk taker, but her blatant campaign of seduction ignites the fuse of passion that's been simmering for far too long. All thoughts of backing off are off, but can he live with himself amid the shards of a broken promise?