From the best-selling author of The Dead Key and No One’s Home, comes a thriller about a haunted mansion, a missing girl, and the woman who connects them.

Life fell apart for Mannie Wallace after her daughter Sally’s best friend was abducted from the playground right under Mannie’s nose. Six years later, Mannie is working as an engineer-turned-insurance investigator and barely holding the pieces of her family together. When an eccentric crew of developers hires her to survey Stone Mad Castle, an infamous Gilded Age mansion, it could be just the thing she needs to get her career—and life—back on track.

But once she’s inside the abandoned structure, Mannie starts seeing ghosts, and she soon learns that Stone Mad’s sinister past may be connected to her own tragedy. If her daughter, now 14 and obsessed with true crime, is right, the house is tangled up with a string of missing girls that stretches back for more than a century. Past intertwines with present as Mannie risks everything to discover the mansion’s secrets and uncover the fate of Sally’s missing friend.

Twist follows twist, like the hidden passageways that honeycomb the castle, racing toward a fatal confrontation. In the end, Mannie must solve the mystery of Stone Mad once and for all…or become the next chapter in the house’s haunted story.