Galactic Odyssey — Keith Laumer

Down and out on planet Earth... It was raining, starting to sleet. My last ride had dumped me twenty country miles from nowhere. If I didn't get warm soon I was going to die. That's why I took a chance on that weird corn silo, even after I knew it was...something else. and that's why I, Billy Danger, woke up 400 light years from home, "native" gun bearer for a lordly alien and his beautiful mistress.