I just e-mailed my friends to get clarification on, I would like to know also. They are very reliable people, so sit tight and I will find out. And no, they do not teach other agencies. So, I hope they will be willing to say what the caller stated..
As far as keeping the books for reference....I have had some excellent classes due to the Instructor but I have never looked up any information in a PADI manual. Personally, I don't think there is much in them at all. Please don't flog me, I just call it like I see it. I don't think the books are a good value for the money, from a content perspective. Honestly, I am trying to think of one single book, I have ever looked at more than once.....maybe the workbook with some math problems in it for the DM exam. Maybe Nitrox, to help someone with it.
I mean come on, the wreck diving book has like three facts in the entire book. And the videos make my mind drift. And I think they need a more reliable way to test math at the higher levels because the exams are "out there" and its important that the math is understood, not just passed on the exam.