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.

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.

George and Harold are forced to contemplate a world without Captain Underpants. George and Harold have been turned into evil zombie nerds doomed to roam a devastated, postapocalyptic planet for all eternity! Unfortunately, the boys can't count on Captain Underpants for help because Tippy Tinkletrousers and his time-traveling hijinks prevented George and Harold from creating him in the first place! With Tippy having changed the course of human history...

Fairy-tale detectives Sabrina and Daphne Grimm face their first case without Granny Relda's help when the future gets mixed up with the past in Ferryport Landing, and because some of the future does not look bright, Puck helps them try to make some changes.

"When the magic tree house whisks Jack and Annie back in time, they land in the tallest tree in Yosemite, California where they join nature conservationist, John Muir, and US President Teddy Roosevelt on a historic trip through the woods"--

With the realm at peace and few dragons about, the Knights of the Round Table are bored, so Merlin sends them to face the most terrible lizards of all--dinosaurs.

"'Please come to Camelot.' When they read this note, Jack and Annie know they must travel to Camelot and the castle of King Arthur. The magic tree house whisks them through time and space, where they find that the castle itself has been attacked and King Arthur himself has been gravely wounded. To save the kingdom -- and the king -- Jack and Annie must solve a riddle, trick a band of robbers, and journey to the worlds of myth to find a missing dragon....

"The magic tree house whisks Jack and Annie to Africa where they must use magic to save a rhino and her baby from poachers" --

Regan Fitz and Elliot Mason have been enemies since they started training to become Glitchers--people who travel through time to preserve important historical events. But everything changes when they find a letter from Regan's future self, warning them about an impending disaster that threatens them and everyone they know. Will they be able to set aside their past in order to save the future?--Amazon.com

From multiple perspectives, Breakout tells of a time capsule project and the middle schoolers who contribute, including future journalist Nora Tucker and newcomer Elidee Jones, whose brother is in the local prison.