Doors: The Christiansen Lineage (Paperback) (ISBN-13: 9781643889627)

In Doors, the second book in the Christensen Lineage Series, Nathan finally accepts, after extensive therapy, that his memories of banishing an ancient demon are a delusion and is ready to put the supernatural world behind him. However, when Nathan and his wife Lucy move to the woodlands of Sussex County, NJ with their twin daughters, Erika and Molly, strange events start to happen.

Their lives take a harrowing turn when Lucy and Molly go missing and find themselves transported to an unknown world. Stumbling upon a village inhabited with the victims of an ancient demon, Lucy begins to realize that Nathan's delusions were reality.

Together, Nathan and Lucy fight to reunite their family, using the twin's telepathic abilities along with help from the coven and new friends from the demon realm.