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.

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.

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.

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.

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.

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.

Hurricane heroes in Texas —Osborne, Mary Pope, author.

"Jack and Annie travel in the magic tree house to Galveston, Texas on September 8, 1900--the day of the worst natural disaster in US history"-- Provided by publisher.

Warriors in winter —Osborne, Mary Pope, author.

"The magic tree house whisks Jack and Annie back in time to meet famed Roman emperor Marcus Aurelius!"--Provided by publisher.

Late lunch with llamas —Osborne, Mary Pope, author.

"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.

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.

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...

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.

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.

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.

Haunted castle on Hallows Eve —Osborne, Mary Pope, author.

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.

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.

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

Warriors : a nonfiction companion to Magic tree house #31: Warriors in winter —Osborne, Mary Pope, author.

"A overview of warriors throughout history--from Ancient Greece to the Middle Ages--the equipment they used, and the most famous warriors in history"--Provided by publisher.

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.