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The Barnes & Noble Holiday Gift Guide Find the Perfect Gift | Shop Now The Barnes & Noble Holiday Gift Guide Find the Perfect Gift | Shop Now
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Magic. Mystery. Time-travel. Get whisked away to the Ice Age on a frozen adventure with brother-and-sister team Jack and Annie in the #1 bestselling chapter book series, now available as graphic novels!

The Ice Age is super cool…for two kids in bathing suits! Jack and Annie nearly freeze when the magic tree house whisks them back to the time of cave bears, early humans, and woolly mammoths. But nothing can stop them from having another wild adventure—not even a sabertooth!

For the first time ...