If you've seen "The Hitchhikers Guide to the Galaxy", you may want to check this out.

1 book, 5 stories. I bought it at Barnes&Noble for $20.

The Ultimate Hitchhiker's Guide
-The Hitchhikers Guide to the Galaxy
-The Restaurant at the End of the Universe
-Life, The Universe, and Everything
-So Long, and Thanks for All the Fish
-Mostly Harmless
-Young Zaphod Plays It Safe

These were originally short radio broadcasts.