A nice concise introduction to the topic of psychopaths with a lot of references to other authors and research.
The language is very easy, not heavy on psychology lingo and what is used is explained in footnotes. Some very famous and basic research in psychology are presented and linked to the topic of psychopaths.
Reading this is like watching a documentary where the presenter is himself a scientist, but he mostly goes around and talks to other scientist about a certain topic, in this case psychopaths.
All in all it's a good introduction and an informative read.