This is probably more of a 3.5 than a 4. My major gripe with this book is the setting and how difficult it was to actually place. Apparently it's set it the future, and the world has gone to shit after some sort of environmental disaster. This basically reset the world to medieval levels of technology and also some new land mass appeared (I only know this because I looked it up, not the from the book itself). So yeah, the world building was not the best. I also had some minor quibbles about the pacing and characterization. In spite of these issues though, I actually really enjoyed the book. I'm looking forward to finding out more about the world and seeing what happens.