I remember a few years ago the journals of the two shooters were released because of the freedom of information act. I'm not trying to glorify these two, but it is kind of interesting to get some perspective on what was going on in their heads leading up to it - however dellusional and disgusting their perceptions were.
Or you can download it from here:
http://www.cbsnews.com/stories/2006/...n1781427.shtml