The only payback I want from you is that you will do your best to learn it. You have a strong will to learn, really to learn, and it's a good quality. Next, you will also have to spread your knowledge you got from the book. I always think that knowledge and information belongs to all mankind, and I hope you'll do the same.
I've asked my staff about it, and she said my original packing was ripped accidentally, so the couriers service staff made a new one (with her consent). I wouldn't mind, actually, if they didn't lost the CD.