I don't get it. In reading all the reviews on Amazon, one says the old (and unspecified) versions are better for the backroads and topographical info, and another review says the newer version is better. I only see the 6th edition from 2006 on Amazon, and when I called Delorme they said they sell the 8th edition 2011. and neither rei or Barnes and Noble has it in stock in Eastern Washington. would sure like more input before I commit to buying. I did read the Fodors guide and bought the Utah Moon guide. Plan on about 3 weeks in September to explore the area in a Subaru outback and am looking for recommendations on maps and guides. Have downloaded the NPS maps and a lot of info. any other ideas much appreciated.