Bearing All (Wild Men of Alaska #4)
Tiffinie Helmer

Former Russian spy, Sergei Lavinsky, code name The Bear, is hibernating on the edge of Alaska. He lures the woman he loves to the Edge of Reason Lodge, hoping enough time has passed that her heart has softened and her knives have dulled.
All she wants is revenge…
Kate “No Mercy” Mercer is a CIA Agent sent to assassinate him. Again. This time she intends to succeed without ending up in his bed. She has a dozen reasons to kill him, and one of them is personal.
They’ll be completely unwrapped before the holiday is over…