Martin may have seen his sister, Cassie, to safety at the end of The Sky
Inside, but his adventure is far from over. There's still a totalitarian
regime in place, murderous game shows on the air, and a couple of
government agents on Martin's tail. When Martin and his AllDog, Chip, go
back to his old suburbs to check up on Mom, they get a lot more than
they bargained for when they end up escaping with both parents. But the
biggest surprise is yet to come--the heart of the government's central
power is closer to Martin than he ever suspected.