Princeton University Press published this book by a Political Science professor at Arizona. It is a psychological study which aims to sort various assassins into several "types."While the book has a certain merit when discussing 19th Century political murderers and mandmen, it is full of outright disinformation about the murders of the Kennedy brothers. Oswald never met Sylvia Duran; she was tortured by the CIA and forced to "confess" that she had met him. CIA officials such as David Phillips have admitted under oath that the visitor to the Embassy where Ms. Duran worked was NOT Oswald. See Peter Dale Scott, Deep Politics and the Death of JFK, University of California Press 1992.