I did Alex's course also, I have to agree with the above postings, as his methods are designed to get you to pass the exam with minimum effort.
Too much pre-reading may give you the wrong mind set, anyone who was "Swattonned" at PPSC will know exactly how complicated this subject can become in the wrong hands.
I wouldn't get too uptight it isn't that bad, and Alex is very good at what he does.