Track the facts about the unicorn of the sea--the narwhal--and its closest relatives!

When Jack and Annie came back from their adventure in Magic Tree House #33: Narwhal on a Sunny Night, they had lots of questions. What is a narwhal? Why is it nicknamed the unicorn of the sea? What other whales live in the arctic? How do they survive the cold? Find out the answers to these questions and more as Jack and Annie track the facts about narwhals and other whales.

Filled with up-to-date information, photographs, illustrations, and fun tidbits from Jack and Annie, Fact Trackers are the perfect way for kids to find out more about the topics they discover in their favorite Magic Tree House adventures.

Did you know that there's a Magic Tree House book for every kid?
Magic Tree House: Adventures with Jack and Annie, 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

Warriors

by Mary Pope Osborne

Published 8 January 2019
Track the facts about warriors, weapons, and battles throughout history in this nonfiction companion to the #1 bestselling Magic Tree House series!

When Jack and Annie came back from their adventure in Magic Tree House #31: Warriors in Winter, they had lots of questions. What kinds of weapons did the ancient Greeks use? How did Roman soldiers fight? Why did knights have tournaments? Who was famous for his war elephants? Find out the answers to these questions and more as Jack and Annie track the facts about ancient warriors.

Filled with up-to-date information, photographs, illustrations, and fun tidbits from Jack and Annie, the Fact Trackers are the perfect way for kids to find out more about the topics they discover in their favorite Magic Tree House adventures.

Did you know that there's a Magic Tree House book for every kid?
Magic Tree House: Adventures with Jack and Annie, 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

Track the facts about the great printer, inventor, and Founding Father, Benjamin Franklin!

When Jack and Annie came back from their adventure in Magic Tree House #32: To the Future, Ben Franklin! they had lots of questions. What was Ben Franklin's first job? How did a kite teach him about electricity? What are some of Ben's most famous inventions? Why did he have so many nicknames? Find out the answers to these questions and more as Jack and Annie track the facts about Benjamin Franklin.

Filled with up-to-date information, photographs, illustrations, and fun tidbits from Jack and Annie, the Fact Trackers are the perfect way for kids to find out more about the topics they discover in their favorite Magic Tree House adventures.

Did you know that there's a Magic Tree House book for every kid?
Magic Tree House: Adventures with Jack and Annie, 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

Track the facts about your favorite animals in the first-ever boxed set of popular Magic Tree House nonfiction!

Jack and Annie love animals! And they love to learn more about the animals they encounter on their adventures in the magic tree house. Join them as they track the facts about dolphins, sharks, polar bears, penguins, pandas, and much more in these four great books.

Filled with up-to-date information, photographs, illustrations, and fun tidbits from Jack and Annie, the Fact Trackers encourage kids to find out more about the topics they discover in their favorite Magic Tree House adventures. Recently rebranded, these four Fact Tracker paperbacks all in one box are the perfect gift for animal lovers, nonfiction readers, and fans of the Magic Tree House series.

Set includes:
Dolphins and Sharks
Polar Bears and the Arctic
Penguins and Antarctica
Pandas and Other Endangered Species