The magic tree house takes Jack and Annie back in time to feudal Japan where the siblings learn about the ways of the Ninja.

Bobby and the Traveler from Cloral--Spader--have flumed to New York City, 1937. Against a backdrop of gangsters, swing music, and the distant sound of a brewing war, the two must uncover the evil Saint Dane's newest plot.

After being sent to jail for the rest of their lives, George and Harold are taken on a trip back in time by Tippy Tinkletrousers back to their Kindergarten days where they must deal with their bully without the help of Captain Underpants.

The end has come and Team DEVIL face their biggest challenge. The DEVIL has opened the Seven Seals of the Apocalypse, and if Hell and Up There don't find a way to come together, then the souls of the Afterlife will be lost forever.

The dark wizard Maldred has trapped dragon master Eko as well as wizards who have opposed him, all of them frozen in time and space inside a wall in his hideout; so Drake and Worm set out to seek the help of the Time Dragon--but when a imp named Beezel interferes Drake ends up back in his own past, and he must find a way to get back to the present.

"The future has been saved, but at a cost: Fort Fitzgerald has been expelled from the Oppenheimer School, and some of Fort's friends have been lost in time. But time is the one thing Fort, Rachel, and Jia don't have, as they'll soon be facing one of the eternal Old Ones, the Timeless One, for the fate of the world. If they lose, the Old Ones will return, and humanity is doomed. If they win, the Old Ones will still return, and humanity is doomed. Because...

Yeti Blizz Richards and his gang of cryptids set out to find a friend for Vanessa, the Loch Ness Monster, even though it means traveling back in time to the dangerous age of the Cretaceous looking for plesiosaurs--unfortunately Vanessa proves to be rather timid about meeting other dinosaurs.

Sixteen-year-old Mirae, crown princess of her kingdom and fated to destroy an enemy of the gods, must embark on a dark journey to save her brother when her coronation ceremony goes terribly wrong.

When time traveling students from a British magic school warn of a coming world war, Fort and his friends at the Oppenheimer magic school try to change the future without making things worse.

When Matt, Ruby, and Corey Hudson discover their subway train is actually a time-traveling eighteenth-century frigate captained by a mysterious pirate, they are thrown into a series of adventures that offer cryptic clues about their past and their future.