Dead Air by K. Sterling

He hid in the woods to escape a monster but found a demon in his bed.
Six years ago, rising political star Niall Gilpatrick was living a lie. A fearless and vocal activist, he hid that he was himself a victim. After a brush with death, Niall ran, starting over as a park ranger in the Shenandoah Mountains.
But now, strange dreams and an impossibly dashing biologist have upended his tranquil existence.
And that was the point.
An ancient Irish demon, Chance Curn was sent to tempt this surprisingly wholesome mortal into selling his soul. He’s haunting Niall’s dreams and playing with his heart, but it is Chance who finds himself in a dangerous trap.
Since when did demons have feelings?
Now, Chance has to decide if he’s willing to risk it all for a mortal and Niall must face his fears to trust a demon with his heart and his life. Can they save each other or will they become dead air?