As her mother prepares to be a contestant on the 1970s 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.

Jason and Rachel's adventures and friendships have made Lyrian more of a home to them than they could have imagined, so now, armed with the prophecy of a dying oracle, they are ready to become Lyrian's heroes whatever the cost to themselves.

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 evil Muns tries to trick Abby into helping him change the history of the world while her and Derick's grandfather asks Derick to finish a challenge that a trusted teacher was never able finish.

Cousins Patrick and Beth find themselves in a world of jousting tournaments and English knights, where they get to meet their Albert, but things go awry at Lord Darkthorn's castle, where they are accused of theft, and Patrick and Beth need to sort friend from foe before Lord Darkthorn decides to lock Albert away in his tower.

Fourteen-year-old Jason Walker is transported to a strange world called Lyrian, where he joins Rachel, who was also drawn there from our world, and a few rebels, to piece together the Word that can destroy the malicious wizard emperor, Surroth.

The youngest of the Murry children must travel through time and space in a battle against an evil dictator who would destroy the entire universe.

Mr. Whittaker uses the Imagination Station to transport cousins Patrick and Beth to the Holy Land in 1000 B.C., where Hugh is trying to change history by helping the Philistines defeat the Israelites.

Beth and her cousin Patrick travel in the Imagination Station back to Plymouth Colony in 1621 where they try to capture Hugh, another time traveler from 1450 who has been trying to stir up trouble between the Pilgrims and local Native American tribes.

Derick and Abby Cragbridge continue their seventh-grade year at Cragbridge Hall, where they run into competitions, new friends, virtual zombies, and real danger.