Fairhurst Press
Fairhurst Press

Five turning points. One war for history.

The Divergence Engine — book cover, design by Caitlyn Fairhurst
Book one of The Divergence Engine — out now on Kindle

The Divergence Engine

History is not just written — it is being rewritten.

Dr Sarah Walmsley authenticates relics for a living. She has handled a thousand pieces of the past. She has never handled one that shouldn't exist.

Summoned to a sealed chamber beneath Tonbridge Castle, she expects another routine medieval find — and instead uncovers a Norman-era pendant built with engineering eight centuries too advanced to be real. It is the truth her father died to protect. It is called the Divergence Engine. And it opens the past like a door.

She is not the first to find that door. A secret order has guarded it since the barons faced King John at Runnymede — and they do not merely study history. They rewrite it. The England we remember is not the only one that was ever meant to be.

Now the Society knows what Sarah knows. To protect a truth that could unmake the present, she must outrun the people who decide which history survives — before they erase her from it entirely.

For readers of Blake Crouch, Kate Mosse and Dan Brown — a breakneck collision of medieval history and impossible science.

Buy the Kindle eBook — out now Paperback & hardback publish 11 August 2026

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Fairhurst Press

Dean Fairhurst writes historical thrillers rooted in the real fault-lines of English history — the moments where the Britain we know was almost something else entirely. The Divergence Engine is his debut, and the first of five novels following one team across eight centuries of contested history. He lives in Kent, close to the medieval landscapes that shadow his fiction.

Paperback & hardback: 11 August 2026

The Divergence Engine — Book One of The Divergence Engine, from Fairhurst Press. The Kindle eBook is already out.

Buy the Kindle eBook — out now