Dinosaurs before dark —Osborne, Mary Pope, author.

Eight-year-old Jack and his younger sister Annie find a magic treehouse, which whisks them back to an ancient time zone where they see live dinosaurs.

Moonlight on the magic flute —Osborne, Mary Pope, author.

Jack and Annie travel to Vienna, Austria, in 1762 where they meet the young Wolfgang Amadeus Mozart and his sister and help save the budding genius' life.

Pirates past noon —Osborne, Mary Pope, author.

The magic treehouse whisks Jack and Annie back to the days of deserted islands, secret maps, hidden gold, and nasty pirates.

Monday with a mad genius —Osborne, Mary Pope, author.

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 knight at dawn —Osborne, Mary Pope, author.

Eight-year-old Jack and his younger sister Annie use the magic treehouse to travel back to the Middle Ages, where they explore a castle and are helped by a mysterious knight.

A big day for baseball —Osborne, Mary Pope, author.

"Jack and Annie use the magic tree house to travel back in time to 1947 Brooklyn, New York, where they pretend to be batboys at Jackie Robinson's first game with the Brooklyn Dodgers against the Boston Braves"-- Provided...

Narwhal on a sunny night —Osborne, Mary Pope, author.

"The magic tree house whisks Jack and Annie away to Greenland where they discover they've traveled back in time to meet Lief Erikson"-- Provided by publisher.

To the future, Ben Franklin! —Osborne, Mary Pope, author.

"Jack and Annie are whisked back in time by the magic tree house to meet Benjamin Franklin in Old Philadelphia"-- Provided by publisher.

Leprechaun in late winter —Osborne, Mary Pope, author.

Dragon of the red dawn —Osborne, Mary Pope, author.

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

Carnival at candlelight —Osborne, Mary Pope, author.

While on a mission to prove to Merlin that they can use magic wisely, Jack and Annie travel to seventeenth-century Venice, Italy, to save the city from disaster.

Balto of the Blue Dawn —Osborne, Mary Pope, author.

"Jack and Annie travel back in time to 1925 Nome, Alaska, where they meet Balto, the famous sled dog, and help save the town from illness"-- Provided by publisher.

Narwhals and other whales : a nonfiction companion to Magic Tree House #33: Narwhal on a sunny night —Osborne, Mary Pope, author.

When Jack and Annie came back from their adventure in Magic Tree House #33: Narwhal on a Sunny Night, they had lots of questions. What is a narwhal? Why is it nicknamed the unicorn of the sea? What other whales live in t...

Mummies in the morning —Osborne, Mary Pope, author.

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.

Night of the new magicians —Osborne, Mary Pope, author.

Jack and Annie visit the Paris World's Fair of 1889 in an effort to protect four scientific pioneers from an evil sorcerer.

Ninjas and samurai : a nonfiction companion to Magic tree house #5, Night of the ninjas —Osborne, Mary Pope, author.

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....

Dark day in the deep sea —Osborne, Mary Pope, author.

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 ...

Magic tricks from the tree house : a fun companion to magic tree house #50: hurry up, Houdini! —Osborne, Mary Pope, author.

With simple instructions, easy-to-follow diagrams, and tips from Jack and Annie, Magic Tricks from the Tree House is tailor-made to teach kids how to wow friends and family in their very own magic shows.

Vacation under the volcano —Osborne, Mary Pope, author.

Their magic tree house takes Annie and Jack to Pompeii just as Vesuvius is about to erupt, and they must find a Roman scroll before everything is covered with burning ash.

Warriors in winter —Osborne, Mary Pope, author.