Bureau of Special Investigations

The sequel to The Ring of Charon . Humans face two enemies—the implacably powerful Charonians who kidnapped the Earth, and the mysterious Adversary, before whom the Charonians quake in fear. Can an unlikely combination of scientists, corpses, dictators, and professional troublemakers withstand both threats and return the Earth to its proper place in the Solar System?

The world of Inferno is dying. A world where Spacers work with Settlers, where standard Three-Law robots exist alongside the controversial New-Law robots. A world that will be uninhabitable in a few decades. Their only hope comes from a plan some call insane, and some call visionary: drop a comet on the planet.