Cragbridge Hall

When twins Abby and Derick start junior high at the prestigious academy their grandfather founded, Cragbridge Hall, they discover firsthand the dangers of time travel and must find a way to save their parents, who have been sent to the Titanic the night it sank.

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

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.

When twins Abby and Derick start junior high at the prestigious academy their grandfather founded, Cragbridge Hall, they discover firsthand the dangers of time travel and must find a way to save their parents, who have been sent to the Titanic the night it sank.