The #1 bestselling Magic Tree House series is ready to whisk you away through time with Jack and Annie! This time, meet famous explorer Leif Erikson and help save a narwhal!

When the magic tree house whisks Jack and Annie to Greenland, they're not sure what time they've landed in, but they immediately know what their mission is: save a narwhal! Then they meet a young hunter named Leif Erikson and they ask for his help. But Leif has other ideas...

Track the facts with Jack and Annie in the nonfiction companion to this book: Narwhals and Other Whales.

Did you know that there's a Magic Tree House book for every kid?
Magic Tree House: Perfect for readers who are just beginning chapter books
Merlin Missions: More challenging adventures for the experienced reader
Fact Trackers: Nonfiction companions to your favorite Magic Tree House adventures

If you're looking for Merlin Mission #33: Carnival at Candlelight, it was renumbered as part of the rebrand in 2017 as Merlin Mission #5.
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