While spending the summer at their grandmother's Vermont inn, two prankster siblings awaken young ghosts from the inn's distant past who refuse to "rest in peace.".

Froggy, having built a tree house with his friends and decided on a boys only rule, is surprised when Frogilina helps save his pizza party.

When Jack and Annie travel back to the Kansas prairie in search of "something to learn," they gain an understanding of how hard life was for pioneers and they experience the terror of a tornado.

Tired of the rules that have bound them ever since "the bad thing happened," twelve-year-old Diana ignores her brother's warnings and befriends the daughter of the new caretaker, setting in motion events that lead to the release of the spirit of an evil, crazy woman who once ruled the old Willis place.

Having used their magic tree house to travel to India, where they must get a gift to help free the dog Teddy from a spell, Jack and Annie have adventures involving a tiger and other endangered jungle animals.

The magic tree house takes Jack and Annie to San Francisco in 1906, in time for them to experience one of the biggest earthquakes the United States had ever known.

Ten-year-old Malcolm and his best friend Dandy, armed with a ghost detector ordered from Beyond Belief magazine, make a late-night trip to a haunted house, despite the warnings of Malcolm's great-grandmother.

Jess needs a fresh start. She's broke and alone, and she's just left her job under less than ideal circumstances. Her half-brother Ben didn't sound thrilled when she asked if she could crash with him for a bit, but he didn't say no, and surely everything will look better from Paris. Only when she shows up, to find a very nice apartment, (could Ben really have afforded this?) he's not there. The longer Ben stays missing, the more Jess starts to dig...

The magic tree house carries Jack and Annie to New York City in 1938 on a mission to rescue the last unicorn.

"Jack and Annie are magically transported to mid-1800's Thebes where they are saved from a dangerous accident by Florence Nightingale!"--Publisher.