The Broken Wheel — Kerry Greenwood

After the Three Days disaster stripped the earth with fire, the people who were left formed groups to survive. There were the Travellers, who traded in small goods and stores. There were the medieval role players still carrying on such traditions in a place called Thorngard. There were the damaged tree men and the lost children. There was the Tribe, a loose gathering of nomads. And the city held the Breakers, the Children of the Broken Wheel, who destroyed every machine more complex than an egg timer, because the machines had brought catastrophe to the world. Out along the road, Sarah, a Child of the Breaker, encounters the Travellers in an attempt to save the world from a last final obliteration. An enthralling story from the author WHALEROAD, CAVE RATS, FERAL and the STORMBRINGER trilogy.