Explosive Vengeance by Kaylea Cross

Two opposites in uncharted territory.
The government made Chloe Wilson an explosives expert, trained to take out a target with a precise, controlled hit. But there’s nothing controlled about her current situation—or the danger coming after her. When a good-looking stranger is sent to watch her back, she’s not impressed. This mission is personal, and it’s liable to get her killed. The former Valkyrie can’t afford any mistakes or attachments, but this time she has no choice, and soon her new partner proves his worth.

One explosive situation.
When former Pararescueman Heath Barrett gets a call from his best friend asking him to keep tabs on a woman in danger, he has no idea what he’s getting himself into. Far from a helpless civilian, Chloe holds him at knifepoint the first time they meet. She’s a deadly operative being hunted by lethal enemies and by the time he realizes the extent of the danger, it’s too late to walk away. Now they’re both targets, and he and Chloe must face the threat head on—and if they want to survive, they’ll have to do it together.