Dies the fire trilogy

The Change occurred when an electrical storm centered over the island of Nantucket produced a blinding white flash that rendered all electronic devices and fuels inoperable. What follows is the most terrible global catastrophe in the history of the human race-and a Dark Age more universal and complete than could possibly be imagined.

Ten years after the Change, the survivors in western Oregon have learned to live in a world without technology, but when the future is threatened by the Lord Protector, the leaders of the city-state Corvallis, the Willamette Valley, and the land west of Salem must band together to save their region from further devastation.