Because of the long tradition of exposition which has developed around Aristotle"s De Anima, the interpretation of even its most central theses is sometimes disputed. Moreover, because of its evident affinities with some prominent approaches in contemporary philosophy of mind, Aristotle"s psychology has received renewed interest and has incited intense interpretative dispute in recent decades Many of the earliest books, particularly those dating back to the 1900s and before, are now extremely scarce and increasingly expensive. We are republishing these classic works in affordable, high quality, modern editions, using the original text and artwork.