Polar Bears Past Bedtime

"Where are the lions?" Jack wonders when the Magic Tree House whisks him and his sister to the vast plains of Africa. Before he can find out, Annie starts to help hundreds of wildebeests cross a rushing river. Next, they follow a honey of a bird and meet an awesome Masai warrior. Jack hopes any lions will just stay away. But Jack is about to be very disappointed.

George, aka "Suds", has just entered third grade, and he's heard the rhyme about "first grade babies/second grade cats/third grade angels/fourth grade rats," but what does this mean for his school year? It means that his teacher, Mrs. Simms, will hold a competition every month to see which student deserves to be awarded "the halo" which student is best behaved, kindest to others, and, in short, perfect. Suds is determined to be the first to earn the halo, but he's finding the challenge of always being good to be more stressful than he had anticipated.

Their magic tree house takes Jack and Annie deep into the sea, where they meet up with dolphins, sharks, and octopi as they search for the answer to an ancient riddle.

Jack and Annie are whisked 40 years forward in time and land at an international space station on the moon. There they don space suits and go exploring the lunar surface in search of the fourth object needed to free the enchantress Morgan le Fay from a powerful spell.

Jack and Annie are off on another adventure! This time they are sent to ancient Greece, where a very important event is taking place. Join them as they race against time and witness the very first Olympic Games!

Where did the tree house come from? Before Jack and Annie can find out, the mysterious tree house whisks them back to the prehistoric past. Now they have to figure out how to get home. Can they do it before dark, or will they become a dinosaur's dinner?

Is this town haunted? Jack and Annie wonder when the Magic Tree House carries them to the Wild West. But before they can say "Boo!" they rush headlong into an adventure filled with horse thieves, a lost colt, rattlesnakes, and a cowboy named Slim. Will Jack and Annie have time to solve the next Tree House riddle? The answer may depend on a ghost!

In their first adventure as Master Librarians, Jack and In their first adventure as Master Librarians, Jack and Annie go to the city of Pompeii to bring back an ancient story that is in danger of being lost forever. Little do they know they are saving the myth of Hercules! But before they can find it, the town's volcano erupts in a mighty explosion. Just when things look hopeless, Jack and Annie get some unexpected help from a certain mythic hero...and the rest, as they say, is history.

In Mummies in the Morning, Jack and Annie get another mummy when the Magic Tree House whisks them back to ancient Egypt after reading a book on the same subject. There, they find themselves in a pyramid, face to face with a long dead queen named Hutepi. She needs their help finding her copy of the Book of the Dead for a trip to the underworld. Will Jack and Annie be able to solve the puzzle, or will they end up as mummies themselves?

Robby creates comic strips on his computer. His favorite creation is Dr. Maniac, a weird and wicked supervillain. Dr. Maniac isn't a real doctor, but he sure is a maniac. And now he's on the loose . . . in the real world!

Jack and Annie are off in search of another story in jeopardy, this time at a monastery in ancient Ireland. Trouble arrives when Vikings land, and Jack and Annie must find a way to escape!

The castle looms dark against the light of the moon. Giant ravens circle in the sky. The wind whistles through the empty windows. Merlin the magician needs someone to find out what has happened. But who is brave enough to brush the cobwebs aside and go through the heavy doors? Who is smart enough to solve the mystery of how the castle became haunted and return it to its rightful owners? Merlin thinks he knows the answer to these questions.

Jack and Annie are whisked back to the Civil War, where they meet Clara Barton and save the life of their very own great-great-great-grand-father.

An adventure to blow you away! That's what Jack and Annie get when the Magic Tree House whisks them back to the 1870s. They land on the prairie near a one-room schoolhouse, where they meet a teenaged schoolteacher, some cool kids, and one big, scary bully. But the biggest and scariest thing is yet to come.

Inspired by the Celtic legend and the spirit of the imagination, Christmas in Camelot is Mary Pope Osborne's gift to young listeners everywhere. It begins with a simple invitation to spend Christmas Eve in Camelot, a magical place that exists only in myth and fantasy. What Jack and Annie don't know is that the invitation will send them on a quest to save Camelot itself, not from destruction, but from being forgotten forever.