Have Space Suit, Will Travel

Have Space Suit - Will Travel is a science fiction novel by Robert A. Heinlein published in 1958. It has a strong comedic tone, even in comparison with Heinlein's other works.

Warning: Plot details follow.

Kip, a bored high-school senior, enters an advertising-jingle contest, hoping to win an all expenses paid trip to the moon. He doesn't, but as a consolation prize he gets a used spacesuit. Resigned to making the best of a disappointing situation, he fixes it up and is walking around in it playing with the radio when a flying saucer lands, and he's captured by evil aliens and taken to the moon! Once there, he escapes with the aid of a fellow captive. However, they are recaptured and taken to the alien base on Pluto where their doom seems sure - until they are rescued by another, superior race of aliens, only to discover that much more than their own fates hang in the balance...