Monday with a Mad Genius
Jack and Annie know they have to search for one of the four secrets of happiness to help Merlin the magician find joy in his life again. And so they head off in the magic tree house for Florence, Italy, in the early 1500s to spend the day with one of the greatest artists and inventors of all time–Leonardo da Vinci!
Dark Day in the Deep Sea
Jack and Annie know they have to find one of the four secrets...

Guided by a magic rhyme, Jack and Annie travel to ancient Baghdad on a mission to help the Caliph disseminate wisdom to the world.

The magic tree house carries Jack and Annie to New York City in 1938 on a mission to rescue the last unicorn. In this exciting new Merlin Mission, Jack and Annie go back in time to New York City, during one of the darkest periods in the city's history--the Great Depression. Even worse, the city is in the grip of a terrible snowstorm. To stop the blizzard, Jack and Annie must save the unicorn made famous in the Cloister's medieval tapestries. But will...

Blizzard of the Blue Moon
Jack and Annie are off on another Merlin Mission. This time, Merlin has sent them to rescue a beautiful magical creature–the unicorn. But when they land in New York City during the Depression of the 1930s, Jack and Annie are confused. Where will they find a unicorn in a big city? And what about the blizzard that's burying New York in snow? Can Jack and Annie make their way through the windy streets, find the...

Jack and Annie travel 500 years back in time to Florence, Italy, and spend a day helping Leonardo da Vinci in the hope of learning another secret of happiness.

The #1 bestselling chapter book series of all time celebrates 25 years with new covers and a new, easy-to-use numbering system!
Jack and Annie arrive on the one continent they haven’t visited before: Antarctica! What can they hope to learn about happiness in such a barren place? Only the penguins know for sure…Jack and Annie are about to find out!
Formerly numbered as Magic Tree House #40, the title of this book is now Magic Tree...

When eight-year-old Jack and his seven-year-old sister, Annie, join a group of nineteenth-century explorers aboard the H.M.S. Challenger, they learn about the ocean, solve the mystery of its fabled sea monster, and gain compassion for their fellow creatures.

The #1 bestselling chapter book series of all time celebrates 25 years with new covers and a new, easy-to-use numbering system!
Jack and Annie must rescue a beautiful magical creature—the unicorn. But when they land in New York City during the Depression of the 1930s, Jack and Annie are confused. Where will they find a unicorn in a big city?
Formerly numbered as Magic Tree House #36, the title of this book is now Magic Tree House Merlin...

The #1 bestselling chapter book series of all time celebrates 25 years with new covers and a new, easy-to-use numbering system!
Jack and Annie are headed to a land of fierce samurai and great beauty, the capital city of Edo (now the city of Tokyo), in ancient Japan in the 1600s. They bring only a research book to guide them and a magic wand with three special rules.
Formerly numbered as Magic Tree House #37, the title of this book is now

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The #1 bestselling chapter book series of all time celebrates 25 years with new covers and a new, easy-to-use numbering system!
Jack and Annie are on a mission to find—and inspire—a musician that brings happiness to millions of people. After traveling to New Orleans, Jack and Annie come head to head with some real ghosts, and discover the world of jazz when they meet a young Louis Armstrong.
Formerly numbered as Magic Tree House...