Amazon has three books listed about systems by John Gall that look very similar, is there a specific one that you're talking about? or would recommend to start

Amazon has three books listed about systems by John Gall that look very similar, is there a specific one that you're talking about? or would recommend to start with? http://www.amazon.com/s/ref=nb_sb_noss?url=search-alias%3Daps&field-keywords="General+systemantics" http://www.amazon.com/s/ref=nb_sb_noss?url=search-alias%3Dap...