In the Belly of the Beast by Jack Henry AbbottRead about another entry on the list.
Abbott was the imprisoned murderer Norman Mailer befriended via mail correspondence and who murdered again after he'd won early release. Besides the Mailer-Abbott letters, this book contains an astonishing philosophical disquisition by the self-taught Abbott, who absorbed quantities of Marx, Schopenhauer, and Nietzsche while serving time.
--Marshal Zeringue