Dies the Fire (Emberverse Series #1)

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.

"Dies the Fire kept me reading till five in the morning so I could finish at one great gulp..."—New York Times bestselling author Harry Turtledove