It is a looping, self-referencing piece of meta-fiction that frequently seems designed to infuriate the reader. These moments of frustration are generally preludes to moments of delight as Leyner proceeds to skewer the exact element that was pissing you off in the first place. It happens once, you kind of laugh and get back into the story. It happens twice you start to realize that maybe it's intentional. By the third time you realize that you are being played by the book and the author (or by the insidious periodontal tool of the neo-pagan deity XOXO, if The Sugar Frosted Nutsack is to be believed), and you realize what a masterful hand it took to craft this seemingly insane clusterfuck.
This is certainly Leyner's most avant-garde book length work to date. Which is saying something. It's a fascinating read for writers as well since few works can make you wish that you could write something as great, and then on the same page make you wish you could get away with publishing something so ridiculous. By the end, you're fairly certain that that was part of Leyner's intention.
Definitely worth checking out.