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HISTORY UNDER ATTACK Hundreds of ships carrying thousands of Viking warriors are attacking medieval Paris. The Parisians are fighting back, but they can only hold out for so long. And that\u2019s bad news - especially since Dak has been captured and forced to work with the invading army while Sera and Riq defend Paris from within. No matter which side wins, the kids will lose . . . unless Dak can find an ally among some of history\u2019s fiercest warriors.