I also feel that you can't really learn this type of thing in just one week. Whether you learn or not, you won't get that money back, I'll bet.
I recently ordered a book about astral travel, out of curiosity. While I found the subject matter intriguing, I realized that you really can't teach this in a book. There are websites purported to teach this skill, but all they are doing is tellng you to imagine this, envision that. Some people are not good at visualizing. The few times I spontaneously left my body, I hadn't done any of the prep described in the book (diet, good sleep, etc.) It just happened, for no reason that I could see. On one of the websites for remote viewing, I found that if I focused, I could make out outlines of the target, but just barely.