Search Worlds Without End

A human has been murdered on Kopernik and the clues point toward a robot as the killer. But how can that be, when robots are programmed to never bring harm to humans? Before long, roboticist Derec Avery is on his way to Kopernik to investigate. Former Auroran ambassador Ariel Burgess, meanwhile, has a mystery of her own to unravel: Citizens of the Nova Levis colony have been disappearing in greater numbers, while the cyborg population has suddenly started growing at a dramatic rate. With the help of old friends - and potentially new enemies - Derec searches for the identity of a killer, unaware that Ariel is walking directly into the centre of the web of intrigue.

Senator Clar Eliton of Earth and Ambassador Galiel Humadros of Aurora hope to alter the strained and explosive relationships between Earth and the Spacer and Settler Worlds. But as the Spacers arrive on Earth to begin the conference that will reconcile decades of mistrust, assassins strike down Eliton and Humadros and their staffs.

In the chaotic aftermath, Derec Avery - and Ariel Burgess - join forces, to penetrate an insidious conspiracy that sprawls across Earth, Spacer, and Settler worlds and threatens to bring them all to the brink of war.

Coren Lanra is the head of security for DyNan Manual Industries. A former Special Service agent, he's never cared for bureaucracy, piracy, or deception. And he hates mysteries.

Lanra's troubles begin with the death of Nyom Looms, daughter of DyNan president Rega Looms, during an ill-fated mission to smuggle illegal immigrants from Earth to the colony Nova Levis - all were apparently murdered, but why?

The only clue might be contained within the positronic brain of a robot that had accompanied the victims, but it has been deactivated, and Lanra is denied access to its memories. With the help of roboticist Derec Avery and Auroran ambassador Ariel Burgess, Lanra searches for the identity of a killer, before more lives are lost.

The Third Law of Robotics states that a robot must protect its own existence, as long as such protection does not conflict with the First or Second Laws...

In Mirage and Chimera, Mark W. Tiedemann explored the fear and hatred toward robots - and their offworld owners - held by the people of Earth, and the animosity toward Terrans expressed by all Spacers. Now, all the plot threads of Tiedemann's epic story come together in this exciting conclusion to the Isaac Asimov's Robot Mysteries cycle.

After the diplomatic failures of the Spacer mission on Earth - which began with the assassinations of key diplomats and politicians, and culminated with the uncovering of a vast plot to create cyborgs from terminally-handicapped human infants - Ambassador Ariel Burgess and roboticist Derec Avery are recalled to their home planet, Aurora. Unfortunately, their situation only worsens when they arrive, as they become suspects in yet another murder - one that, based on the evidence, could only have been committed by a non-human.

On a world with a 20-to-1 robot-to-human population, is it possible a robot could have violated the Three Laws governing its behavior - and if so, why? Or is something far more sinister at work?