When the magic tree house whisks Jack and Annie off 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...

When Jack and Annie travel back in time to Galveston, Texas, on September 8, 1900, they find themselves facing a horrific storm that resulted in the worst natural disaster in US history.

During the Great Depression six-year-old Marvel, her seven siblings, and their mother find a tar-paper shack in the woods and, over the course of a year, turn it into a home. Based on the author's grandmother's childhood; includes historical notes.

"The magic tree house whisks Jack and Annie away to South America, where they must climb Machu Picchu to save a baby llama" -- Provided by publisher.

The #1 bestselling chapter book series of all time celebrates 25 years with new covers and a new, easy-to-use numbering system!
Hold your horses! Jack and Annie must find four secrets of greatness for Merlin the magician. To start, they travel back in time to meet Alexander the Great. He should know all about greatness, right? But young Alexander is bossy, vain, and not great at all! How can they learn from him? It’s going to take a wild...

We are warriors! Jack and Annie have met knights, pirates, ninjas, and Vikings, but they have never met the most fearsome warriors of all: Roman soldiers. When the magic tree house whisks them back to the early 100s AD, Jack and Annie find themselves in a Roman camp. Their mission: Be like a warrior. That is easier said than done! The Roman soldiers are much scarier in person--and suspicious of strangers. Then a mysterious man riding a black horse...

In this exciting new installment in the Flat Stanley's Worldwide Adventure series, the Lambchop family is off to Boston, Massachusetts, for a little history and a whole lot of fun. And for parents and teachers, each Flat Stanley book is aligned to the Common Core State Standards, like multicultural adventure, plot and character development story elements, and compare and contrast. When the Lambchop family gets to Boston, Stanley is excited to go on...

Jack and his younger sister take a trip in their tree house back to ancient Egypt, where they help a queen's mummy continue her voyage to the Next Life.

The magic tree house takes Jack and Annie back in time to feudal Japan where the siblings learn about the ways of the Ninja.

In Harlem in the 1920s, in the middle of a family Christmas party, Marie receives a nutcracker from her Uncle Cab, which leads to a marvelous dream in this resetting of E.T.A. Hoffmann's familiar tale. Includes historical notes.