Well, I *have* been to Burning Man - twice. That's why I was extremely curious about this book, because, as "burners" say- there is no one way to describe it.
Given the (non)fictional environment - the author does a really good job. Both of embedding a believable mystery, and of making Black Rock City and its myriad denizens believable.
The multiple characters capture well several (obviously not *all*) views of the festival, and Dex - poor clueless Dex - is the perfect fish-out-of-water (HA!) "virgin burner."
The author does a good job describing realistically the extreme climate, the necessary safety, the communal spirit, the insanity and the joy of what it means to survive Burning Man. And several perennial theme camps/exhibitions/personalities are described, so any citizen of Black Rock will recognize "home" (Draca, Thunderdome, Bianca's, Dr. Megavolt.)
Fun read.