Wasteland: Book 1: Cities in Dust — Antony Johnston

A hundred years after the Big Wet, Earth is broken—a barren and infertile world where the few survivors struggle for survival. When Michael, a scavenger bearing strange gifts, calls at the shanty town of Providence, the effects are devastating. Now the townsfolk must cross the deadly wasteland to Newbegin, a nearby city where the past meets the new status quo. But Newbegin's cruel dictator is busy oppressing anyone not belonging to his church— which includes the Providence survivors. This volume collects issues 1-6 of the series.