Each of the guides below is a book registered in the public domain. You are invited to read as many as you like. If you find that you don’t like something because it doesn’t agree with your point of view then please don’t post a comment just because it doesn’t agree with you just forget about it. Negative comments will not be allowed. If you want to constructively disagree with what someone else commented on thats fine but give substance to your disagreement. Thank you.