The Sleeper

The Sleeper by Holly Seddon is a Mystery release out on November 17, 2026.

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The Sleeper

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The Sleeper Release Date: November 17, 2026

Coming Soon

In this gripping alternate reality thriller by international bestselling author Holly Seddon, one woman must navigate a life that was never meant to be hers in order to uncover unsettling truths about her past and the man she loves—from the author of the “unreal and unforgettable” (Lisa Jewell, New York Times bestselling author) of 59 Minutes.

Librarian Maya is traveling home from Edinburgh to London when her sleeper train is struck by lightning. She wakes the next morning in a version of London she doesn’t recognize.

Not only is a stranger living in her apartment, but her husband Arthur has disappeared. Worse, in this reality, the Berlin Wall never fell, the Cold War never ended, and Britain is an authoritarian Soviet state. Maya’s parents did not kiss by the falling Berlin wall while on their gap year travels, and so Maya was never born.

Confused, alone, and with nowhere to go, Maya stumbles across the resistance movement, in which librarians like her play a key part. Sent undercover into the heart of government, Maya must navigate this terrifying world while desperately trying to find the people she loves—and a way home.

Featuring Holly Seddon’s signature “propulsive and thought-provoking” (Mark Edwards, author of The Wasp Trap), The Sleeper is a unputdownable and utterly unique thriller that will keep you guessing until the final page.

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Genre: Mystery

Holly Seddon

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