A crumbling island mansion. Two unruly children. One nanny caught in a family’s darkest secrets.

Zoe Smith thought she could outrun the past. But when she arrives at the isolated Mansfield estate to care for twin siblings, it doesn’t take long to realize something is deeply wrong.

The children’s mother is missing in action, consumed by addiction. Their grandfather, Thomas Mansfield, rules the home with cold authority, while his much-younger wife, Carlotta, keeps to the shadows, guarding secrets she refuses to share.

Then come the strange noises. The late-night sightings. The feeling that someone is always watching.

As Zoe tries to protect the twins from the dysfunction swirling around them, she finds an unlikely ally in Frenchie, the family’s loyal and mysterious butler. But the deeper she digs, the more twisted the truth becomes.

Because on this island, the past doesn’t stay buried, and the worst threats live inside the house.

The Nanny Effect, Book is a chilling new installment in the domestic thriller series The Nanny Problem from best-selling authors Lauren Street and Nolon King.