Tholan by Kathi S. Barton

Tholan had made a grave mistake. He had thought his charge dead and had taken her before it was her time, causing a rift in her family’s timeline. He knew he deserved to die for his mistake but was given instead a thousand years of solitude to reflect on his mistake.
Parker Brooks loved her da, and when he was arrested for robbery and murder, a crime he wasn’t even physically able to commit, she confessed to it to keep him out of jail. Parker spent ten years in prison for a crime neither of them had committed. Her da died while she was behind bars.
Fresh out of prison, Parker was introduced to the Mystics. They were a loud and boisterous bunch, and a bit much for her to take. Seeking solitude, Parker met Tholan, a Mystic she could relate to and let her guard down. When she fell asleep, Tholan could see the demon of her nightmares and knew that she was in major trouble.
Her stepmother had sold Parker’s soul to a demon, and he was there to collect. But Parker wasn’t going to take this laying down. With Tholan at her side, Parker would conquer Hell to fix this.