Snakes in suits

I was actually trying to look for a paper clip, yet I ended up buying this book. No apparent reasons! I'm not a man of book but for few reasons?

• It is in English, love it!
• It isn't thick, a companion when queuing up?
• What else? It talks about psychopaths, it've been of my greatest interest.

It might just have been the first book I ever completed reading:P Wish me luck.