Surrogate by Kathryn Mackel

The perfect candidate to carry their child...with the perfect opportunity to destroy their lives.

When Kyle Dolan convinces his wife, Bethany, to hire a surrogate for their last surviving embryo, they allow themselves to hope once again. A med school student, Laurel Bergin seems perfect in every way. Problem is--Laurel Bergin is really Sable Lynde.

As the pregnancy progresses, Sable's dark secrets surface, and her inner demons spill out into the Dolans' lives. In a terrifying encounter, Sable is injured and lapses into a coma. Now the Dolans face psychological and supernatural forces they never knew existed.

Fearing for their sanity, their own lives, and the life of their baby, they confront the surrogate--and the darkness surrounding her--in a heart-stopping climax that will keep you reading late into the night.