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 magic tree house takes Jack and Annie to Antarctica to search for the fourth secret of happiness for Merlin.

Travel to Ancient Greece with Jack and Annie as they meet Alexander the Great and help tame his wild stallion.

"When Jack and Annie receive an invitation to spend Christmas Eve in Camelot--a magical place that exists only in myth and fantasy--they know they are in for their biggest adventure yet. What they don't know is that the invitation will send them on a quest to save Camelot. Can they succeed even though Camelot's greatest knights have failed?"--Amazon.com.

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...

As a thank-you from Merlin and Morgan, Jack and Annie are sent on what should be a vacation at a luxurious resort in Cozumel, Mexico, but is, by mistake, an adventure with ancient Mayans, instead.