“The best debut novel I’ve ever read.” —Tess Gerritsen, bestselling author of the Rizzoli & Isles series

“An exceptional thriller. It left my nerves jangling for hours after I finished the last page.” —Dennis Lehane, New York Times bestselling author of Moonlight Mile

S. J. Watson makes his powerful debut with this compelling, fast-paced psychological thriller, reminiscent of Shutter Island and Memento, in which an amnesiac who, following a mysterious accident, cannot remember her past or form new memories, desperately tries to uncover the truth about who she is—and who she can trust.