I really don't see what all the fuss is about with this book. Sure, it's interesting enough at first, but only until you take a closer look. The characterization is uneven, the writing is clunky not too mention barely adequate, and the world-building is all done on the fly with no more thought given other than authorial whim. The whole book is a house of cards that will collapse if you just glance at it wrong. In particular, the psychology and mentality behind the cleanings, behind the whole silo and backstory is just incomprehensible. Frankly, I could make more sense out a surrealist painting while high on LSD.
I recognize that quite a few people like this work which is why I'm giving it two stars. But to be honest, to me this book is another example of why self-publication has a bad reputation.