Such wasted potential here. Colin was an interesting character and I was intrigued by how he saw the world. Green could have written a witty, fascinating book about the struggles of being a fading child prodigy. I found his internal monologue (as well as the anagrams and footnotes) at times very involving. 
 Which just makes the actual novel even more frustrating. Green strands this character in a plot that is alternately contrived and dull. The supporting characters are similarly annoying (Hassan) or boring (Lindsey and the other denizens of Gutshot Tennessee). Colin has no friendship or romantic chemistry with any of the other characters here. I was either bored or annoyed every time Colin interacted with someone. I found the plot very boring and the Katherines' theorem a cute idea that far overstayed its welcome. 
 This book is also a total wit fail. It was rarely funny or clever like it wanted to be. As much as I wanted to get invested in Colin, nothing about this plot worked for me. Green also used extreme word repetition in a way that drove me up the wall. I never need to see the words fug/fugging, kafir, spitzpinkler, and dingleberry ever again. The jokes were just dumb and crude. 
 As I mentioned, I saw so much potential in this book, and I am fond of the author both as a writer and as a celebrity personality, but this just didn't click for me at all. I only finished it because a) it was short and b) I have a positive bias towards John Green.