High Altitude Airship (Mechanicals Book 3)
by Peter R Stone
Bradley Millner, Megan, Robby, and their little Mechanical friends, are given one last mission to save the world from the evil Mechanicals. The Orb has taken them to a high altitude airship. A Mechanical onboard is using it to enlarge the hole in the ozone layer. They have to stop it, for without the ozone layer, humanity, the animals, and most of the earth’s plant life, will die.