Derick and Abby Cragbridge continue their seventh-grade year at Cragbridge Hall, where they enter competitions, meet new friends, run into virtual zombies, and real danger.
The evil Muns tries to convert 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.
The evil Muns tries to convert 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.
Abby and Derick have been accepted to the most prestigious secondary school in the world—Cragbridge Hall. Due to the inventions of their grandfather, Oscar Cragbridge, they will be able to experience
When twins Abby and Derick start at Cragbridge Hall, the school their grandfather founded, they discover firsthand the dangers of time travel and must find a way to save their parents, who have been s
