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.
After returning the missing children from history to their original time periods, thirteen-year-old Jonah must save time itself when aviator Charles Lindbergh mysteriously appears and kidnaps Jonah's sister.
Dorrie and her brother Marcus accidently open a portal to Petrarch's Library, where they discover a secret society of warrior librarians who travel in time, protecting the world's greatest thinkers from torture and death for sharing knowledge and ideas.
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.
After having an argument in the treasure chest room, twins Felix and Maisie are transported to China during the Boxer Rebellion, where they meet a young Pearl Buck who teaches them how to survive as Americans in China.
A team of intergalactic warriors that includes Star-Lord, Gamora, Drax, and Rocket Raccoon protects Earth from extra-terrestrial threats, including an invasion by the Badoon that threatens London.
Magically transported to southwest China to find the final object needed to break the spell on the wizard Merlin's beloved penguin, Jack and Annie take a side trip to the world's largest giant panda reserve.
As her mother prepares to be a contestant on the 1980s television game show, "The $20,000 Pyramid," a twelve-year-old New York City girl tries to make sense of a series of mysterious notes received from an anonymous source that seems to defy the laws of time and space.
