Stolen Life - The Scary Mary Series, #7

A few months ago, Mary didn't know she had any living relatives until Jake contacted her. He may live a few states away, but distance means nothing to him. He can go wherever he wants with his mind's eye, except one place. It's a place of death and shadows, and their relative Tracy Rathbone has been trapped there for nineteen years. Jake needs Mary's help to bring her home. Mary wants to help, but she's cautious.
Tracy is in the land of Shadowmen, the terrifying creatures that slip through cracks and take a person's life force. Mary has only ever gone up against one Shadowman at a time and each time she has only barely won. Going up against an army of them would be impossible.  She doesn't need to worry about the Shadowmen though. Tracy has a plan. She just needs Jake to bring Mary to her. She'll take care of the rest.
Mary really should've asked more questions about the plan. Because it isn't so much an escape plan as a trade, and Mary's the one being traded. Abandoned, alone, and scared, Mary must figure out how to get home and take back her stolen life.