So yeah, just like everyone else I read this book and enjoyed it. I give it 4 stars just for being a bit too breezy and brief. 
 I feel that one thing this book actually did not capture very well was the staggering breadth of a**holery on Wall Street. I worked at a prototype HFT firm on Wall Street back in 2003-4 and frankly it almost killed me. The people who do completely automated trading are completely fixated on the money and nothing else. 
 As a side note, it was surreal to read about deleting your bash history in a popular book like this.