In this book, R.E. Allen provides a superb translation of the Parmenides along with a structural analysis that procedes on the assumption that formal elements, logical and dramatic, are important to its interpretation and that the argument of the Parmenides is aporetic, a statement of metaphysical perplexities. Allen's original translation of and commentary on the Parmenides were published in 1983 to great acclaim and have now been revised by the author.