I accidently ordered the wrong version of this book and realized this right after I clicked go. Trying to get in touch with anyone was just awful. Someone got back to me and said I need to talk to the seller not amazon. Trying to do that is near impossible. When the girl finally answered my email which stated "please do not ship me this book, it is the wrong version and take it off my credit card", her reply to me was that it is version 4 and sent it to me anyway and left it on my card. So now I am the owner of the 4th edition of a book that I will NEVER read!