If you haven't seen
this account of dealings with a belligerent spammer, you should take a look. It's an excellent read, an ongoing story, and it's been updated recently. First read the Executive Summary, then scroll down to the huge chronicle of emails.
It reminds me of
Fair Use: The Story of the Letter U and the Numeral 2, a book that documents a battle involving Negativland, U2, Casey Kasem, and various record labels. The book is mostly correspondence (letters, memos, and legal papers) assembled to show a really interesting sequence of events.
If you have any interest at all in digital rights or privacy, I recommend both of these.