St. Drogo's Books

First written in 1941 by Dr. Hervey Cleckley, The Mask of Sanity is a theory of how the psychopathic mind works as a result of numerous interviews with incarcerated psycopaths. The book exposes psycopaths as being far from stereotypically "crazy", but in actuality quite charming, personable and mentally sharp, only they work toward nothing but causing suffering to both themselves and others. The original edition is no longer available, but an expanded version was published in 1982.

http://www.mindhacks.com/blog/2006/07/the_mask_of_sanity.html