The mysteries of a remote estate lead a young woman down a twisted path in this gripping gothic thriller from the Edgar Award–winning author of Or Else.

After a car accident took the lives of both her parents, Mira Caine's transition to adulthood was hard and fast. Solely responsible for the welfare of her intellectually disabled younger brother, she's searching for a better life for them both when she's approached by an enigmatic woman with an offer that seems like the answer to their problems. Allison Wyndclyffe, the young heir to an enormous fortune who's suffered her own trauma, is in need of a mentor and companion.

Isolated on an island in the St. Lawrence River lies the Wyndclyffe estate—beautiful but possessing a dark and complicated legacy. As Mira settles in and befriends her troubled charge, she quickly learns her new home is full of questions that no one wants to answer. What caused Allison's father to murder his wife and almost kill his daughter? How is the tragedy connected to the arcane writings Mira stumbles across? And why do parts of the island feel strangely familiar to her?

As more of the sprawling manor's secrets are revealed through Allison's damaged psyche, Mira's sense of time and self begin to erode. Before long she will come face-to-face with the unspeakable truth at the heart of Wyndclyffe, and not everyone will make it off the island alive.

Perfect for fans of Karen M. McManus's The Cousins and Shirley Jackson's We Have Always Lived in the Castle, Edgar Award–winning and Wall Street Journal–bestselling author Joe Hart's Wyndclyffe is a taut, multilayered mystery that pulls you in and won't let go.