Mary Pope Osborne

The #1 bestselling chapter book series of all time celebrates 25 years with new covers and a new, easy-to-use numbering system! Getting the facts behind the fiction has never looked better.
Track the facts with Jack and Annie!
 
When Jack and Annie got back from their adventure in Magic Tree House Merlin Mission #15: Leprechaun in Late Winter, they had lots of questions. What are leprechauns? How do we know...

Presents a non-fiction companion to the book "Abe Lincoln At Last!," discussing what it was like to grow up in a log cabin and what Lincoln's family life was like, and describes how he became the sixteenth president of the United States.

Discusses dolphins and sharks, their ocean habitats, and general information about oceans and oceanography.

Presents a non-fiction companion to the book "A Perfect Time for Pandas," discussing endangered species, from what pandas eat and where they live to why leatherback sea turtles are scarce.

A fact-filled companion to Jack and Annie's fifth adventure discusses what it was like to be a ninja or samurai in ancient Japan and whether or not such talented martial-arts masters actually possessed special abilities.

On Christmas Eve, Jack and Annie's tree house transports them to King Arthur's castle at Camelot, where they undertake a quest to the castle of the Otherworld.

The magic tree house takes Jack and Annie to Antarctica to search for the fourth secret of happiness for Merlin.

When Merlin is weighed down by sorrows, Jack and Annie travel back to feudal Japan to learn one of the four secrets of happiness.

Jack and Annie are joined by Teddy and Kathleen as they travel to the snowy Land-Behind-the-Clouds, where they search for the eye of the Ice Wizard and attempt to help Merlin and Morgan.

When Jack and Annie travel back to the Kansas prairie in search of "something to learn," they gain an understanding of how hard life was for pioneers and they experience the terror of a tornado.