The Arizona Atlas & Gazetteer is pretty much a "must have" if you're going to do traveling around Arizona. Observing sites are pretty easy to pick out on these maps, either from directions or longitude and latitude. I noticed that Amazon.com has these books available at a significant discount. Just less than $14. This is the 5th edition (December 2002) according to Amazon. If you can get together with someone and order two or more copies, or can otherwise make a $25 order, shipping is free. http://www.amazon.com/exec/obidos/tg/detail/-/0899333257/qid=1074622639/sr=1-4/ref=sr_1_4/103-3554895-2619813?v=glance&s=books -Paul