The Sleeper

A forensic auditor with a mind that never stops noticing. A long-distance sleeper train crossing Central Asia. A dead man in Compartment 3. And six passengers who are not what they seem.

Zara Kessler boards the sleeper train at Almaty station with nothing more ambitious than a battered notebook, a pair of noise-cancelling headphones, and the hope that a journey across the Silk Road might help her recover from the career implosion that drove her out of London. She is autistic, brilliant, and exhausted - a pattern-reader who sees the world in data and detail, and who has spent her whole life being told she sees too much.

When a fellow passenger is found dead in his compartment, Zara becomes the only person on the train willing to investigate. She catalogues the crime scene with forensic precision: the temperature of the tea, the angle of a curtain, a faint bitter smell she cannot name. Her observations are meticulous. Her senses are razor-sharp. Her notebook fills with details that nobody else seems to notice.

And then the other passengers start telling her she's wrong.

I don't think that's what happened. Are you sure you saw that? Maybe the altitude is affecting you. You look tired - maybe you should rest.

One by one, the witnesses contradict her findings. The corrections are gentle, reasonable, concerned - and relentless. Zara begins to doubt herself. She crosses out observations with her own pen. She adds question marks to entries she was certain of hours before. The woman whose perceptions have always been her greatest strength is being systematically convinced that they are her greatest weakness.

But Zara's mind works. It has always worked. And buried beneath the corrections and the contradictions and the carefully performed concern, a far larger secret is waiting - one that connects every passenger on the train to the dead man, and that turns a closed-circle murder mystery into something far more personal and far more dangerous than anything Zara expected to find.

The question is no longer just who killed the man in Compartment 3. The question is whether Zara will trust her own mind long enough to find out.

Set against the breathtaking landscapes of Kazakhstan and Uzbekistan - the endless golden steppe, the red sands of the Kyzylkum Desert, the turquoise domes of Samarkand and Bukhara, the rusted ghost ships of the Aral Sea - The Sleeper is a locked-room mystery on rails, a novel about perception and trust, and a love letter to the extraordinary world of the Silk Road.

For fans of Agatha Christie, Knives Out, and anyone who has ever been told they notice too much.