There is also this book - "Confessions of a Sociopath by M.E. Thomas" which seemed to be popular a few years ago. It's unclear how reliable the narrator is but I remember it had a jarring effect on me: https://www.amazon.com/Confessions-Sociopath-Spent-Hiding-Pl...

There are a couple good books about Sociopath/Psychopath if anyone is interested.

The Psychopath Test: A Journey Through the Madness Industry @ http://www.amazon.ca/The-Psychopath-Test-Journey-Industry/dp...

Confessions of a Sociopath: A Life Spent Hiding in Plain Sight @ http://www.amazon.ca/Confessions-Sociopath-Spent-Hiding-Plai...

I highly recommend both of these, since they are a very interesting read.