In a world without power, how far will one man go to save his son?On the five-year anniversary of his wife Hannah's disappearance, small-town cop Noah Sheridan takes his son Milo to a local ski resort to remember-and to try to heal. Then the impossible happens. Everything electronic dies. The power grid fails. Cars stall. Phones go dark. In an instant, their quiet holiday becomes a desperate fight to stay alive.When a white-out blizzard slams Southwest Michigan, the town is cut off from the rest of civilization, and the rule of law swiftly collapses along with the power grid. The frigid cold sets in. Food supplies dwindles. Strangers turn threatening and neighbors choose sides.Noah must make impossible choices, forge uneasy alliances, and face enemies unlike any he's ever known. At the end of the world, he'll have to risk everything to save his son and protect the home he loves.Kyla Stone is the USA Today bestselling author of more than 25 novels with over two million copies sold worldwide. Edge of Madness is the explosive second book in the acclaimed Edge of Collapse apocalyptic series, now optioned by Sony Television Pictures for television. A haunting exploration what it takes to survive in a world gone dark, for fans of SILO, The Last of Us, and Station Eleven.*Rated PG-13 for mild language and moderate violence*