Frosted and Sliced (Private Spies #4)
Vanessa Gray Bartal

Georgette already had two strikes in life, first with a profound hearing impairment and then with the loss of her parents. All she had left was her inn, and she had only herself to rely on. She couldn't say no to any business opportunity, not even the reclusive hobo who moved in uninvited, declaring himself her handyman, a position she didn't advertise and couldn't pay for. Georgette couldn't fathom her new boarder and vowed to steer clear, an easy task when the former spy was so invisible she sometimes thought he was imaginary. She thought she would tolerate him until he decided to move on, never dreaming how much she might learn to rely on him.
When an unknown threat appears, Burke is well-equipped to dispense it. If only it were as easy to deal with Georgette and the newly inexplicable flutters in his previously unused heart. How do two outcasts fall in love? With a few misunderstandings and a whole lot of hot cocoa.