Few philosophical books have been so influential in the development of Western thought as Aristotle's Metaphysics. For centuries Aristotle's most celebrated work has been regarded as a source of inspiration as well as the starting point for every investigation into the structure of reality. Not surprisingly, the topics discussed in the book - the scientific status of ontology and metaphysics, the foundations of logical truths, the notions of essence and existence, the nature of material objects and their properties, the status of mathematical entities, just to mention some - are still...