On a desert planet the giant sandminer crawls through the howling sandstorms, harvesting the valuable minerals in the sand. Inside, the humans relax in luxury, while most of the work is done by the robots who serve them. Then the Fourth Doctor and Leela arrive – and the mysterious deaths begin. First suspects, then hunted victims, Leela and the Doctor must find the hidden killer – or join the other victims of the Robots of Death.

Long ago and far away, the Doctor and Leela faced the Robots of Death... To a society dependent on robots, the news that these benign, tireless, obedient labourers could be turned into killers would cause panic. So it was kept a secret. In Kaldor City, only three survivors of the Sandminer massacre know the truth. But now, several years later, they are beginning to show signs of mental breakdown. And once again, the robots are being programmed to kill. Can the dead genius Taren Capel possibly be involved in this new outrage? Worst of all, this time the deadly robots are not confined to a Sandminer. This time they are loose in Kaldor City. And this time, unless the Doctor and Leela can stop them, they really will destroy the world...

"You are dealing with a professional. Probably a hired killer. Resourceful, highly intelligent. A computer specialist." Kaldor: A city of robots on a world of robots. The Board runs the Company, and the Company runs the planet. Nothing happens in Kaldor City without the Board’s approval. So how come its members are dying? Company Chairholder Uvanov is faced with an escalating problem: political allies and enemies are being killed and nobody knows who will be next or why. Even Carnell, the ex-Federation psycho-strategist, is at a loss to provide an explanation. One man may hold the answers—a man who crossed the border into Kaldor City six hours ago: Kaston Iago, a man with a past and maybe an agenda. A man with the skills to set everything right. Kaldor City - Occam's Razor uses characters and concepts from Chris Boucher's Doctor Who novel Corpse Marker to tell a dark, aggressive tale of ultraviolence and political intrigue.

"Taren Capel? The mad god of the robots. He was famous, briefly, but then, weren't we all?" Someone is spinning a web. Links are forming between one man's need for violence and another's desire for power; a desert ore processing station and a long dead enemy of the state. Someone, maybe everyone, is being manipulated. Carnell is the obvious culprit, but who is the psycho-strategist working for, and what could their motive possibly be? Kaldor City - Death's Head uses the characters, situations and settings that appear in Chris Boucher's Doctor Who novel Corpse Marker, to tell a complex tale of sex, money and death.

"Cause and effect. It applies to everything." Taren Capel's legacy is unleashed, and death stalks the streets. As Uvanov fights for his career and life, Paullus contacts a force which could be the salvation of the people of Kaldor—or their destruction. With Carnell gone, Iago is the only one who can save the city from its fate—but to do that, he must sacrifice everything... Kaldor City - Checkmate uses characters and concepts from Chris Boucher's Doctor Who novel Corpse Marker to tell an apocalyptic tale of subterfuge and revelation.

"Evolution. No one said it was going to be easy." Eighteen months after her final confrontation with Iago, Blayes awakes to find Kaldor City in quarantine and herself on a Storm Mine in the Blind Heart Desert. Her companions are three strangely familiar figures, a vengeful spirit—and a robot with a dangerous secret. Trapped in a claustrophobic, dreamlike environment, the former terrorist must now undertake a journey which may end in the destruction of her world... or its beginning. Kaldor City - Storm Mine uses characters and concepts from Chris Boucher's Doctor Who novel Corpse Marker to tell a mindbending tale of discovery and transformation.