Science Fiction
Eerl was one of a billion alien tourists on Bay-zar, but not even his degree in Human Studies could prepare him for what came next: A military beefcake with a grudge, a wartime conspiracy, a galaxy full of prejudice, and at the center of it all, a young human in search of the truth.
The Hitchhiker's Guide to the Galaxy by Douglas Adams;
Another Fine Myth by Robert Aspirin;
Stranger in a Strange Land by Robert Heinlein