Rent a Thief — Beate Boeker

When Tina wakes to find a masked thief in her bedroom, she's shocked to discover she might be attracted to him, and now she's wondering if she's lost her mind. True, her plan to move to Seattle to be closer to her daughter and grandchild isn't working out as she liked, and she's lonelier than ever, but has she resorted to dangerous thrill-seeking?
As Tina starts to dig up the secret history of the old mansion where she lives, she keeps seeing phantoms and wondering if she's in reality talking to “her thief”. Soon, she realizes the thief stole nothing but her heart - but is he interested in her or in the priceless antique necklace she can lead him to?