I'm slowly working my way through the free section of the Kindle store. I have to say, I was pleasantly surprised by this one. It was a quick read and I found myself intrigued by the world the characters lived in. I wish there would have been the perspectives of other characters-- Lewis, perhaps so I could get a little more info on some of the more shock and awe aspects of the book. 
 Tl;dr: I'd read another by the same author if found in the free section of the Kindle store.