The Rocketeer: In the Den of Thieves (The Rocketeer: In the Den of Thieves #2)

Cliff is frantic when he discovers that his mentor and close friend, Peevy, has been snatched by Nazis. The goose-steppers are hell-bent on creating an army of Rocketeers! But with his jet pack out of commission, there is no hope for him to rescue his friend... until the mysterious inventor of the pack steps in to help!