A Space Opera of a different color by Harry Harrison. A long time ago, there was a planet called "Dirt" (or something like that). It was there that humanity had its start, and from there they spread out, developing a large number of planets with diverse civilizations and forms of government. With enough wealth, you can enjoy a wealth of luxurious accomodations on various vacation planets. Then again, someday you might find yourself held at gunpoint while the government confiscates your ship and goodies and trucks you off to a short life of back-breaking labor for the good of the local planetary empire. But, hey, you should have read the tourist guide before you landed.