Harry Turtledove's remarkable alternative history novels brilliantly remind us of how fragile the thread of time can be, and offer us a world of "what if." Drawing on a magnificent cast of characters that includes soldiers, generals, lovers, spies, and demagogues, Turtledove returns to an epic tale that only he could tell-the story of a North American continent, separated into two bitterly opposed nations, that stands on the verge of exploding once again.