The Revolution Beyond Time - Infini Calendar, #3

Nelly Flowers has the same problems as any twelve-year-old. Homework; the anxiety that goes with moving to a new place; finishing her food; being kidnapped and dropped out of an self-destructing aeroship; being kidnapped again and taken to a secret prison underneath Death Valley where an shape-shifting madman plots the enslavement of the human race. Yeah, typical kid stuff. And if Nelly and her new friends can't outwit another Gnostagar invasion force, humanity will be grounded...
forever.