Basically, this is an introduction to (or maybe a synopsis of) Aristotle's Categories by the Neo-Platonist Porphyry. I just finished Aristotle's logical works, so that subject matter is still fresh enough in my mind that nothing here struck me as terribly novel or elucidative. That being said, this work was popular during the Middle Ages and some have found it helpful when reading Aristotle's categorical writings.

I am going through Porphyry's works at the moment, so I will save my comments regarding him for other reviews. ( )