Sky Jumpers Sky Jumpers Series, Book 1.

In this thrilling sci-fi adventure, epic danger and impossible odds are no match for one girl's courage! Twelve-year-old Hope lives in White Rock, a town of inventors struggling to recover from World War III. But adventurous Hope is terrible at inventing. She would much rather sneak off to cliff dive into the Bomb's Breath, the deadly band of air that surrounds the town. When bandits invade White Rock to steal its greatest invention-pric...