The Northern Dark by Larissa de Silva

She was sent back in time to help people. Not to fall in love. Right?

Dr. Laura Sullivan is only in England for a conference. She’s enjoying the sights and the people when she practically falls down the stairs in the city she’s visiting. When her eyes open, she’s confronted by the kind of man she can only dream of.
And when she talks to him, she realizes that he must be a fiction. Tall, charming, kind, David takes her in without expecting anything from her, regardless of what the people around him soon.
As Dr. Sullivan becomes the talk of the town, she realizes that she’s falling more deeply for a man that might as well not exist. She has to decide: is she going to give up the live she worked so hard for just to be with a man who might not be ready to be with her after all?