Osborne, Mary Pope

Jack and Annie travel back to nineteenth-century Ireland to inspire a young Augusta Gregory to share her love of Irish legends and folktales with the world.

Eight-year-old Jack and his younger sister Annie use the magic treehouse to travel back to the Middle Ages, where they explore a castle and are helped by a mysterious knight.

In their magic treehouse, Jack and Annie are again transported to King Arthur's realm, where invisible beings, giant ravens, and mistaken magic spells have a duke's castle in an uproar on Halloween night.

Their magic tree house takes Jack and Annie to the Arctic, where a polar bear leads them onto very thin ice.

A collection of tall tales about such American folk heroes as Sally Ann Thunder Ann Whirlwind, Pecos Bill, John Henry, and Paul Bunyan.