Action, humor, and real history collide in the Infinity Ring series! History is under attack... and the Viking invasion of Paris has begun. That's bad news for the three time-traveling kids stuck in the middle of the battle. With Dak captured and forced to work for the Vikings while Sera and Riq defend Paris from within, no matter which side wins... the kids lose. BONUS! Join the adventure -- and experience key moments in history -- in the epic online Infinity Ring game. Each book in the series unlocks a whole new quest at scholastic.com/infinityring.