Absolute dreck - responsible for the nonsense that Parmenides was a Pythagorean - (or was it vice versa?) - either way -- avoid -- unless you know a lot about the topic and can read critically.
(Here's a follow-up comment that I should probably lodge here, so it doesn't get completely lost:http://www.goodreads.com/review/show/118716606#comment_21575916)This book is a disgrace, while Kirk was a competent scholar, his book on Heraclitus is quite good, though flawed, Raven was an idiot... and...