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Strat, the wealthy boy with whom Annie fell in love during her first time trip to the 1890s, needs her help when he reveals her real origin and finds himself confined in a mental asylum.

Thirteen-year-old Tom, an unhappy foster child in Liverpool, falls into a massive open grave and is transported to Ireland in 1847, where he finds himself in the midst of the deadly potato famine.

When an "Instant Commuter" transports him to Mount Saint Helens during its eruption, twelve-year-old Warren cannot get himself back to his own home in his own time.

Twelve-year-old David and his family search for their kidnapped mother in the many different time period portals of their home, but when a stranger appears and tries to force them to sell the house, their desperation reaches new heights.

David King and his brother, Xander, at the urging of their uncle on his deathbed, journey through time in search of their abducted mother and on a mission to change the course of events which will lead to a bleak future.

Patricia and her brother Sam are sent far away from home to stay with their strange aunt.

Twelve-year-old David and his family search for their kidnapped mother in the many different time period portals of their home, but when a stranger appears and tries to force them to sell the house, their desperation reaches new heights.

When Spooksville is invaded by dinosaurs that attack people in their cars and swoop from the skies to carry away kids, Adam and his friends discover a portal through which the dinosaurs are emerging that is connecting the town to the 60 million-year-old age of dinosaurs.

On her thirteenth birthday, Toni Douglas discovers that she has special powers.

Although they know it's dangerous, Adam, Watch, and Sally enter the dimensional portal to the Secret Path where they meet their demonic counterparts, and try to rescue their friend Bryce.

"Seventeen-year-old Hylee Williams didn't ask to disappear. But she did disappear, and not only that, but when she vanished from our world, she materialized in a dark, twisted version of the night that changed her life forever: the night her older brother went missing.