In the twenty-first century man created the Eschaton, a sentient artificial intelligence. It pushed Earth through the greatest technological evolution ever known, while warning that time travel is forbidden, and transgressors will be eliminated. Distant descendants of this ultra high-tech Earth live in parochial simplicity on the far-flung worlds of the New Republic. Their way of life is threatened by the arrival of an alien information plague known as the Festival. As forbidden technologies are literally dropped from the sky, suppressed political factions descend into revolutionary turmoil. A battle fleet is sent from Earth to destroy the Festival, but Spaceship engineer Martin Springfield and U.N. diplomat Rachel Mansour have been assigned rather different tasks. Their orders are to diffuse the crisis or to sabotage the New Republic's war-fleet, whatever the cost, before the Eschaton takes hostile action on a galactic scale.

When the planet of New Moscow was brutally destroyed, its few survivors launched a counter-attack against the most likely culprit - the neighbouring system of trade rival New Dresden. But New Dresden wasn't responsible, and as the deadly missiles approach their target, Rachel Mansour is assigned to find out who was. The one person who does know is a disaffected teenager who calls herself Wednesday Shadowmist. But Wednesday has no idea where she might be hiding this significant information. Time is limited and if Rachel can't resolve this mystery it will mean annihilation of an entire world.

An exclusive two-in-one novel from the Science Fiction Book Club, set in Charles Stross Eschaton Universe: Singularity Sky and Iron Sunrise. Singularity Sky: Spaceship engineer Martin Springfield and U.N. diplomat Rachel Mansour hail from an Earth that has gone through the Singularity, an accelerated technological and social evolution far beyond anything we can imagine. The Singularity was triggered by the Eschaton, a super-powerful being descended from humanity that can travel in time and that essentially rules the universe. Springfield and Mansour meet on the home world of the New Republic, a repressive, backwater society that has outlawed virtually all advanced technology other than that necessary for interstellar warfare. When one of the New Republic's colonial worlds is besieged by the Festival, an enigmatic alien intelligence, the Republic counterattacks, using time travel in an attempt to put its warships in position to catch the Festival by surprise. Springfield and Mansour, working for different masters, have both been assigned the task of either diffusing the crisis or sabotaging the New Republic's warfleet, no matter what the cost. Iron Sunrise: In the 24th century, a McWorld ("bland, comfortable, tolerant... boring") called New Moscow apparently has been destroyed by trade rival New Dresdenbut not before New Moscow launched its own Slower-Than-Light (STL) counterstrike: a massive ship accelerated to 80% the speed of light. The U.N., now central Earth government, knows New Dresden was set up. They need the STL's recall code, now known only to a handful of New Moscow's ambassadorsbut someone has been systematically assassinating them. U.N. special operative Rachel Mansour and her husband, engineer Martin Springfield, must protect the last living ambassador and find out who's really responsible for the whole mess.