The #1 bestselling Magic Tree House series for chapter book readers is ready to whisk you away across the world with Jack and Annie--this time to rescue little horses! Perfect for readers ages 6-9!

The wind started to blow. . . and a new magical journey unfolds when the tree house lands in Mongolia, Jack and Annie can hear the drum beat of horses hoofs. The little horses of Mongolia are returning from near extinction and the kids get to meet the people who take care of them. But the horses are still in danger with wolves nearby. . . Can Jack and Annie protect the last of the little horses? 

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
Graphic Novels: Relive the original adventures brought to life with art by Kelly & Nichole Matthews

If you're looking for Merlin Mission #39: Dark Day in the Deep Sea, it was renumbered as Merlin Mission #11 when the series was rebranded in 2017.

About the Author

MARY POPE OSBORNE is the author of the New York Times #1 bestselling Magic Tree House series as well as coauthor of the Magic Tree House Fact Tracker series, along with her husband, Will; her sister, Natalie Pope Boyce; and her good friend Jenny Laird.

AG FORD is a New York Times bestselling children's book illustrator and recipient of two NAACP Image Awards. He grew up in Dallas with his mom, his dad, and his two sisters and one brother. He majored in illustration at Columbus College of Art & Design and now lives with his family in Frisco, Texas.