How do penguins survive in frigid conditions? What happens at a research station in Antarctica? How long can an emperor penguin go without food? What other creatures live in the Antarctic? Find out the answers to these questions and more in the Magic Tree House Research Guide: Penguins and Antarctica.

Discusses dolphins and sharks, their ocean habitats, and general information about oceans and oceanography.

Mary Pope Osborne concludes the exciting adventures of Odysseus, with two new books, each based on episodes from The Odyssey.

Book Five: Return to Ithaca: After years of captivity on Calypso's island, Odysseus finds himself on the shores of yet another strange land. Meanwhile, his wife, Penelope, fears for their son Telemachus.

His enemies—Penelope's unwanted suitors—plan to ambush and kill him upon his

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The magic treehouse whisks Jack and Annie back to the days of deserted islands, secret maps, hidden gold, and nasty pirates

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

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. Morgan le Fay will make Jack and Annie masters of the tree house if only they can solve four riddles -- which will take four books, of course! Dolphins at Daybreak begins the third set of four books in this magical (and increasingly popular) series! Jack and Annie are off in the Magic...

Jack and Annie are joined by Teddy and Kathleen as they travel to the snowy Land-Behind-the-Clouds, where they search for the eye of the Ice Wizard and attempt to help Merlin and Morgan

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. Merlin has asked Jack and Annie to help on another Merlin Mission. This time they head back into history to Venice, Italy, in the 1700s. With the help of some new friends, a research book, and a mysterious rhyme from Merlin, the heroes will save the beautiful city from a flood! Yet another...

Celebrate Christmas with Jack, Annie, and the Magic Tree House with this oversized, gorgeously illustrated deluxe holiday edition. 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...

The magic tree house takes Jack and Annie back in time to feudal Japan where the siblings learn about the ways of the Ninja.