"The year is 2020. It's seventeen years since the Revolution overthrew the last king of the New British Empire, and the newly reconstituted North American Commonwealth is developing rapidly, on course to defeat the French and bring democracy to a troubled world. But Miriam Burgeson, commissioner in charge of the shadowy Ministry of Intertemporal Research and Intelligence--the paratime espionage agency tasked with catalyzing the Commonwealth's great leap forward--has a problem. For years, she's warned everyone: "The Americans are coming." Now their drones arrive in the middle of a succession crisis--the leader of the American Commonwealth is dying and the vultures are circling. In another timeline, the U.S. has recruited Rita, Miriam's estranged daughter, to spy across timelines and bring down any remaining world-walkers who might threaten national security. But her handlers are keeping information from her. Two nuclear superpowers are set on a collision course. Two increasingly desperate paratime espionage agencies are fumbling around in the dark, trying to find a solution to the first- contact problem that doesn't result in a nuclear holocaust. And two women--a mother and her long-lost, adopted daughter--are about to find themselves on opposite sides of the confrontation"--

In this chillingly resonant dystopian adventure, two versions of America are locked in conflict. Invisible Sun concludes Charles Stross's Empire Games trilogy. Two twinned worlds are facing attack The New American Commonwealth is caught in a deadly arms race with the USA, its parallel-world rival. And the USA's technology is decades ahead. Yet the Commonweath might self-combust first - for its leader has just died, leaving a crippling power vacuum. Minister Miriam Burgeson must face allegations of treason without his support, in a power grab by her oldest adversary. However, all factions soon confront a far greater danger . . . In their drive to explore other timelines, high-tech USA awakened an alien threat. This force destroyed humanity on one version of Earth. And if the two superpowers don't take action, it will do the same to them. Invisible Sun follows Empire Games and Dark State. This trilogy is set in the same dangerous parallel world as Charles Stross's Merchant Princes sequence.