Snowbound mystery : It's an unusual winter vacation for the Alden family when a huge snowstorm traps them in the wood! Tree house mystery: The Alden children are helping their neighbors build a tree house. Bicycle mystery : The Alden's are making the journey to their Aunt Jane's house on an overnight bicycle trip.

"When the magic tree house whisks Jack and Annie back in time, they land in the tallest tree in Yosemite, California where they join nature conservationist, John Muir, and US President Teddy Roosevelt on a historic trip through the woods"--

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

A big day for baseball: Batter up! The magic tree house has whisked Jack and Annie back in time to the 1940's. They're in Brooklyn, New York for a very special baseball game. Hurricane heroes in Texas: Jack and Annie are on a mission! When the magic tree house whisks them back to Galveston, Texas, in 1900, they find out that a big storm is coming. But even though there is rain and wind, no one believes there is any danger. As the storm grows, seawater...

Dragon of the red dawn: When Merlin is weighed down by sorrows, the enchantress Morgan asks Jack and Annie of Frog Creek, Pennsylvania, to use their tree house to travel to a land of fierce samurai and great beauty, in the capital city of Edo (now the city of Tokyo) in old Japan in the 1600s to learn one of the four secrets of happiness. Blizzard of the blue moon: Jack and Annie go back in time to New York City, during one of the darkest periods...

Fifth-grader Winnie, with notes from her friends, writes of turning her treehouse into an embassy after her newly-divorced parents become unreasonable, where she is joined by nine others with complaints.