The Organon

If you're looking for the logical treatises of Aristotle, just go and buy Volume 1 of the Complete works; this includes all of the organon and much more. This version has a typo on every other page, and they get so lazy as to tack on the wikipedia article (external links and all) on Aristotle. Do Not Buy.

Excellent recording. I really liked the small segments that keep it from getting boring.Of course the content is already a classic.