From everything I understand, Jason, the best approach is personal experience. Not everyone sees auras the same way. While I think there are some suggestions about interpretations in the course, a book that says "red auras mean the person is angry, blue means they're sad" is probably not going to help you.
Apart from that, I've read a number of books that talk about the aura but I haven't seen many that explain how to read it in any kind of detail.
