The Crown Jewels [Maijstral 1]

Peleng is a planet ripe for the plucking, and Drake Maijstral is an Allowed Burglar rated in the Top Ten by the Imperial Sporting Commission. But what should be a simple case of breaking-and-plundering turns into an intergalactic crisis when Maijstral steals something so rare, so valuable, so utterly desirable, that everyone wants it-- everyone including well-armed Imperial spies, gun-toting human militias, a homicidal maniac with a very large sword, and a fanatical countess with a really, really nasty croquet habit.

The Crown Jewels, by award-winning author Walter Jon Williams, is sophisticated science fiction comedy at its best.