It's a wonderful world that Brent Weeks has created with rules and regulations. It has a somewhat light mathematical structure like you would expect of a science fiction novel. I personally loved it but the characters are not as likable as his other series. I feel that the author slacked in the quality of his writing and some editing would not have gone amiss yet I wished that the story lasted longer.
I will nevertheless read the next book because I have to know what comes next.