Showing Have Spacesuit, Will Travel by Robert A. Heinlein

Essef - One minute Kip Russell was walking about in his backyard, testing out an old space suit and dreaming about going to the Moon - and the next he was out cold, the captive of an insidious space pirate. The whole thing seemed like a bad dream until Kip discovered there were other prisoners on board, and they were all on their way to the Moon - and a fate worse than death!