Wayward WorldIn the year 1264 three young people come into information that the Earth will be destroyed by collision with an interstellar planet in a thousand years. They also learn that in the next year a leading reformer, the father of one of the three, will die in battle, setting back the progress of human history by 400 500 years, a margin great enough to enable people a thousand years later to save Earth. They must cause the battle to go the other way, and