As you may have conjectured when reading the previous text, this book takes everything to a new level. It is crazy and very different, therefore I would place Breakfast on Pluto under the genre Postmodernism. As a result of this, it is best suited for persons who read a lot and is tired of the classic novels and are longing for something new and fresh.
If one would look at the language used in this novel you could see that it is advanced and that it contains expressions which require good education to fully understand. Thus this book should be most popular among well educated persons who care about the culture and like to jump on the bandwagon so to speak. Persons who read Breakfast on Pluto are in generally considered to be topnotch.
I find it a little sad that Breakfast on Pluto has such a narrow target of audience when it contains a message valuable for everyone.