Amazon.com Product Description (ISBN 0451460413, Mass Market Paperback)

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.

Amazon.com Product Description (ISBN 0451459792, Hardcover)

It all started when an electrical storm over the island of Nantucket produced a blinding white flash, causing all electronic devices to cease to function-computers, telephones, engines, radio, television, even firearms-and plunged the world into a darkness humanity was unprepared to face. But even as some people band together to help one another, others are building armies for conquest...