I was quoting Xela's garbage... Read the last sentence. "Sure, but actually (s)he was on warrior forums trying to break into affiliate marketing; trading "E6" and watching MT5 volume. lol you tools."
Does he still offer his class? Otherwise, my three favorites are Hull, McDonald's (Derivatives Markets), and my favorite From Black Schoales to Black Holes. Hull and McDonald are rentable at Amazon. Some Grad/School bookstores still offer copies when they are in the current curriculum. Tough reads, but great content. Used versions are often available in the Grad/School bookstores. Absurdly expensive, but worth every penny. 9