Welcome to the bizarre and dangerous world of Victorian London, a city teetering on the edge of revolution. Its people are ushering in a new era of technology, dazzled each day by new inventions. Airships soar in the skies over the city, whilst ground trains rumble through the streets and clockwork automatons are programmed to carry out menial tasks in the offices of lawyers, policemen and journalists. But beneath this shiny veneer of progress lurks a sinister side. For this is also a world where ghostly policemen haunt the fog-laden alleyways of Whitechapel, where cadavers can rise from the dead and where Sir Maurice Newbury, Gentleman Investigator for the Crown, works tirelessly to protect the Empire from her foes. When an airship crashes in mysterious circumstances, Sir Maurice and his recently appointed assistant Miss Veronica Hobbes are called in to investigate. Meanwhile, Scotland Yard is baffled by a spate of grisly murders and a terrifying plague is ravaging the slums of the city. So begins an adventure quite unlike any other, a thrilling steampunk mystery and the first in the series of "Newbury & Hobbes" investigations.

A steampunk mystery adventure featuring immortality, artifacts, and intrepid sleuths Sir Maurice Newbury and Miss Veronica Hobbes Sir Maurice Newbury, Gentleman Investigator for the Crown, imagines life will be a little quieter after his dual successes solving The Affinity Bridge affair. But he hasn't banked on his villainous predecessor, Knox, who is hell-bent on achieving immortality, not to mention a secret agent who isn't quite what he seems.... So continues an adventure quite unlike any other, a thrilling steampunk mystery and the second in the series of Newbury & Hobbes investigations.

On the surface, life is going well for Victorian special agent Sir Maurice Newbury, who has brilliantly solved several nigh-impossible cases for Queen Victoria with his indomitable assistant, Miss Veronica Hobbes, by his side. But these facts haven’t stopped Newbury from succumbing increasingly frequently to his dire flirtation with the lure of opium. His addiction is fueled in part by his ill-gotten knowledge of Veronica’s secret relationship with the queen, which Newbury fears must be some kind of betrayal. Veronica, consumed by worry and care for her prophetic but physically fragile sister Amelia, has no idea that she is a catalyst for Newbury’s steadily worsening condition. Veronica and Newbury’s dear friend Bainbridge, the Chief Investigator at Scotland Yard, tries to cover for him as much as possible, but when the body of a well known criminal turns up, Bainbridge and Veronica track Newbury down in an opium den and drag him out to help them with the case. The body is clearly, irrefutably, that of the man in question, but shortly after his body is brought to the morgue, a crime is discovered that bears all the dead man’s hallmarks. Bainbridge and Veronica fear someone is committing copycat crimes, but Newbury is not sure. Somehow, the details are too perfect for it to be the work of a copycat. But how can a dead man commit a crime?

A serial killer is loose on the streets of London, murdering apparently random members of the gentry with violent abandon. The corpses are each found with their chest cavities cracked open and their hearts removed. Charles Bainbridge, Chief Inspector of Scotland Yard, suspects an occult significance to the crimes and brings Newbury and Veronica in to investigate.

Following their bloody encounter with the Executioner, Sir Maurice Newbury's assistant Veronica Hobbes is close to death. Desperate to save her life, Newbury and Veronica's sister Amelia board a sleeper train bound for St. Petersburg, in the hope that Gustav Faberge might have the answer. But there are enemies on board, and Newbury and Amelia will need all their strength and cunning to survive the Revenant Express.

George Mann's Newbury & Hobbes steampunk mystery series concludes in this thrilling final volume as our Victorian special agent heroes discover a grand plot to that threatens the state of the world. The time has finally come. Queen Victoria has given the order for her agents to move against the Secret Service—to eliminate the fledgling organisation with extreme prejudice. Caught in the middle of the conflict, Newbury, Veronica and Bainbridge are forced to face up to the truth: that the Queen no longer represents the best interests of the Empire. Now rogue and in league with the Queen's enemies, they must enact the "Albion Initiative" a desperate plan to break Prince Edward out of Bedlam and install him on the throne in the Queen's stead. But with the Queen's executioner and his army on their trail, as well as a possible traitor in their midst, can they do enough to stop the malign tyrant from destroying everything they once swore to protect? With everything falling apart around them, Newbury and Veronica must uncover the macabre truth behind the crown, and in doing so, unravel the very foundations of the Empire. Newbury & Hobbes Investigations #1: The Affinity Bridge #2: The Osirus Ritual #3: The Immorality Engine #4: The Executioner's Heart #5: The Revenant Express