Merlin has another mission for Jack and Annie : to rescue a magical unicorn from New York City! They arrive during a dark period in the city's history-the great Depression. Plus, there's a terrible snowstrom building. Where are they ever goin to find a unicorn in the city? And who are the mysterious people following them
Jack and Annie blast off in the magic tree house for a mission on the moon-in the future! Maybe the msterious moon man can help. Will they complete their task before the air in their oxygen tanks runs out? And why is Peanut the mouse acting so strange?
MErlin has sent Jack and Annie on a mission to the period known as the Renaissance. They must find a secret to happiness, but it will take more than a research book and a magic wand to complete this task. Jack and Annie need help from one of the freatest minds of all time! What secrets will they learn from Leonardo da Vinci?
A castle looms dark against the light of the moon. No candles burn in its windows. No laughter rings through its halls. What has happened to the castle and the people who lived there Merlin the magician asks Jack and Annie to find out. But are they brave enough to step through the creaking doors and solve the mystery of how the castle became haunted?
MErlin the Magician will not eat or sleep or speak to anyone in Camelot. So the enchantress Morgan asks Jack and Annie to help. They must travel in the magic tree house to majestic world of ancient Japan to find one of the secrets of happiness. They have a research book to guide them and a magic wand with three special rules. Will that be enough to help Jack and Annie complete their missions?
In order to save Merlin, Jack and Annie continue their quest for the secrets of happiness. But when the magic tree house leads them to a deserted island, they're not sure who needs help more-Merlin or them! A Shipful of explores and scientis saves them, but the rescuers aren't looking for the secrets of happines. They're looking...a sea monster! Will Jack and Annie wind up in the monster's clut…
To save Penny the penguin, Jack and Annie must go back in time to get a special feather from Abraham Lincoln himself! But Lincoln is too busy running a country at war. So the kids go even further back to look for Abe as a boy. There they meet an orphannamed SAm who also needs their help. Can Jack and Annie save a president, a new friend, and Penny, too?
Jack and Annie are on the run! When the mahgic tree house wisks them to the Amazon River; they dodge killer ants and vampire bats. It's not long before they get hopelessly lost. Will they be able to find their way back to the tree house? Or are Jack and Annie stuck in the rain forest forever?
Brrr! Jack and Annie are in bathing suits when the magic tree house whisks them back to the Ice Age. They meet cave people and woolly mammoths. Will Jack and Annie make it back to the tree house before they freeze? Or will they be a sabertoot's dinner?