Castaneda is the undisputed authority on the subject of "dreaming". I would recommend you check out r/castaneda; it's a very friendly non-toxic community where you'll get any questions you have answered--but be prepared, it's a mixed bag, you'll see discussions about things among the "advanced" users that will disagree with your reason. I forget which book Carlos dedicated just to detailed discussion of dreaming, but most of them discussed dreaming to some extent. I send my best regards to you on your journey to stay focused!