I just read the description of the book on Wikipedia and I'm pretty sure whoever wrote it was high at the time. But now I kinda want a moose with whom I have a telepathic relationship with. The story takes place 5,000 years after the apocalypse. To put that in perspective, to us that would be about 3,000 BCE as was a time when Sumer was a collection of city-states and the Egyptian pyramids were constructed. It doesn't seem odd to excluse Hiero's Journey because at some point it's no longer post apocalpytic. According to Wikipedia, Hierio goes on his quest to save his own civilization. i.e. To prevent an apocalypse.The problem is this would exclude Hiero's Journey, which would seem--odd.