Among the ruins of extinct historical alternatives lies the Imperium, a flourishing power that has established trade relations with worlds so far removed from it within the limits of probability that they do not even think about temporal travel. But the Imperium is not the only world where they have learned to cut through time. In addition, competitors began traveling along time lines much earlier, and their ships are much more advanced than any that people can create. And time itself does not stand still, its lines intertwine, sometimes forming the most unexpected patterns. A true masterpiece of adventure fiction for the first time in one volume and in new translations!