Gottfried Martin 
Introduction to General Metaphysics [PDF ebook] 

First published in 1961, An Introduction to General Metaphysics presents Gottfried Martin’s careful study of many of the passages in Plato and Aristotle which deal with metaphysical problems and in particular with the Platonic Theory of Ideas. He has traced the development of the theory both in early works and in late works such as the Parmenides and the Sophistes; and with equal care he has studied the relative passages in Aristotle’s Metaphysics. He has quoted many of these passages at length and has offered a careful account and analysis of the progress of Plato’s thought. He has also discussed in a very interesting way the main passages relative to Aristotle’s criticism of Plato’s Theory of Ideas. This book is a must read for any student of Greek Philosophy and Philosophy in general.