Actually, I bought a copy from RPGNow, but so far have only skimmed it. As one might assume from the name, the land of Zo bears a striking similarity to Oz, with significant differences. The first chapter is an introduction to fairy tales, and how playing in a fairy tale differs from other genres.
Another interesting bit is that the author not only describes the campaign world, but how it actually played out, complete with commentary by the players.
"On two occasions I have been asked [by members of Parliament], 'Pray, Mr. Babbage, if you put into the machine wrong figures, will the right answers come out?' I am not able rightly to apprehend the kind of confusion of ideas that could provoke such a question."
- Charles Babbage (1791 - 1871)