Comment: Also check out

(See in situ)

Also check out

The Mask of Sanity

Snakes in Suits: When Psychopaths go to work

Without Conscience: The Disturbing World of the Psychopaths Among Us

PCL-R - Psychopathy checklist:

The checklist assesses glib and superficial charm, grandiosity, need for stimulation, pathological lying, cunning and manipulating, lack of remorse, lack of empathy, lack of conscience, callousness, poor behavioral controls, impulsivity, irresponsibility, failure to accept responsibility for one's own actions and so forth.

People of the Lie: The Hope for Healing Human Evil

Ponerology: The Science of Evil

Political Ponerology

Also note that there's a move on to replace "psychopathy" with the more poltically correct and harder-to-prove "anti-social behavior".
(gee, I wonder who would want to do that)