Stopping in Lonely Places. Mahoney and Me Mystery Series, #1

An author departs in her RV on a leisurely book signing tour. A stop for lunch at an isolated spot along the road changes her life when a robber pulls up behind her van and threatens her. A stray border collie intervenes and scares off the aggressor. Of course, she can't leave the dog behind after he saved her, and the collie eagerly accepts her invitation to jump into the camper. That chance encounter with the robber on a lonely road leads to his pursuing her for reasons she doesn't understand.
When she meets Mahoney, the detective assigned to her case, sparks fly between them and a romance blooms. In reply to her question about the intense attraction between them, he says, "You need a Prince Charming to come to your rescue, and I need a Princess to save. Worked out well for both of us, don't you think?"