Death Race (Love on the Line Book 5) - Love on the Line, #5

The road to happiness is paved with danger... Recovering from a gunshot wound is the easy part. Boston cop, Keith Cho, discovers coming to grips with his partner's death requires a different sort of medicine. He'll start a cross country road trip with seeing his partner's sister, Samantha Bates. Sam can't hide the injuries or the backpack she's hauling as she hikes away from town. Fleeing from her abusive ex-boyfriend is key.
When she and Keith reconnect on a back country road, he insists she come with him. Keith is good company but needs to stay firmly in the friend category. Being with a cop can only lead to heartache, something Sam can't handle again. As they travel, frequent accidents seem far too convenient. Are these incidents connected to them or a mystery someone wants silenced? It's a race against death and someone's going to lose.