The Last Train Beneath London: The Secrets of Grimhollow Station, #5

A train arrives at a station that does not exist.

There is no driver.

Everyone aboard is dead.

And beneath Victorian London, something buried for half a century has begun to wake.

Sukey Flint has survived by knowing the parts of London respectable people prefer not to notice. Once an infirmary orderly at the secret Grimhollow Station, she now keeps its impossible network supplied through dockside contacts, forgotten passages, and favors no official ledger records. She trusts people she has chosen. Institutions are another matter.

Edwin Pask has spent years learning how machines can save lives—and how easily brilliant inventions can become instruments of control. No longer merely an apprentice, he has become an engineer in his own right. But when a driverless locomotive rolls into sealed Platform Nine carrying machinery he cannot identify, even Edwin has no explanation.

Then Grimhollow begins operating by itself.

Signals change without operators. Locked doors open and close. Telegraph relays repeat commands no one sent. Ventilation systems awaken. Trains are rerouted through forgotten tunnels. And beneath it all, an enormous hidden mechanism is drawing power from the city above.

As government officials move to seize the station, Sukey and Edwin discover that the forbidden technologies Grimhollow has encountered may share a single buried origin—a mechanical system designed to place London's railways, communications, pressure networks, locks, and emergency infrastructure under centralized control.

Someone intends to restore it.

Stopping him will require every ally Grimhollow has left—and will take Sukey and Edwin into tunnels that were never meant to be reopened.

They have spent years becoming indispensable to everyone except themselves. But as friendship becomes something far more dangerous, they must decide whether love is another necessity to postpone…or the first future they have ever freely chosen.

The Last Train Beneath London is the fifth and concluding novel in The Secrets of Grimhollow Station, a Victorian steampunk romance series filled with forbidden inventions, gothic underground mysteries, political conspiracy, dangerous machinery, and love forged in the shadows beneath London.