Mary Osborne: 239 books

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 for Merlin the magician! This time, the magic tree house whisks them off to Thebes, Egypt, to find Florence Nightingale, a world-famous...

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 don't need another mummy. But that's what they get when the Magic Tree House whisks them back to ancient Egypt. There they meet a long-dead queen who...

The #1 bestselling chapter book series of all time celebrates 25 years with new covers and a new, easy-to-use numbering system! No girls allowed at the Olympic Games! That's the rule when the Magic Tree House whisks Jack and Annie back to ancient Greece. But when Annie tells jack to go to the...

The #1 bestselling chapter book series of all time celebrates 25 years with new covers and a new, easy-to-use numbering system! An adventure that will shake you up! That's what Jack and Annie get when the Magic Tree House whisks them back to California in 1906. As soon as they arrive, the famous...

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...

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 save Merlin from his sorrows! The brother-and-sister team travel back in the magic tree house to the period known as the Renaissance....

The #1 bestselling chapter book series of all time celebrates 25 years with new covers and a new, easy-to-use numbering system! Who would burn books? Jack and Annie find out when the Magic Tree House whisks them back to ancient China. There, a powerful emperor called the Dragon King has ordered...

The #1 bestselling chapter book series of all time celebrates 25 years with new covers and a new, easy-to-use numbering system! The show must go on! That's what Jack and Annie learn when the Magic Tree House whisks them back to Elizabethan England. There they meet William Shakespeare himself—one...

Tom et sa soeur Léa, grâce à leur cabane magique, sont propulsés à l'époque des pirates et vont devoir ruser pour échapper aux cruels pilleurs des mers.

Tom et sa soeur Léa, propulsés dans le passé grâce à une cabane magique, se retrouvent au coeur des mystères de l'Egypte ancienne.

Tom et sa soeur Léa, propulsés grâce à une cabane magique à l'époque du Moyen Age, vont vivre de trépidantes aventures.

Tom et sa soeur Léa sont projetés dans une base spatiale installée sur la lune afin de découvrir le dernier élément qui leur permettra de délivrer la fée Morgane.

Tom et sa soeur Léa sont projetés par la cabane magique à l'époque du premier empereur de Chine. Ils doivent rechercher la première calligraphie d'une légende qui se trouve dans la bibliothèque du palais impérial.

Tom et sa soeur Léa sont projetés par la cabane magique à Pompéi, juste avant la disparition de la ville sous l'éruption du Vésuve. Leur mission : sauver un précieux livre pour la bibliothèque de la fée Morgane.