Buck,

Any store that sells books can order it. it is stocked at most of the national parks in Arizona and Barnes and Noble. if you want to order online -- here are some of those sources:
25-scenic-side-trips-arizona-new-mexico/ (scroll down the page to the links to the online retailers.

And no, the only one of this kind of book is the Arizona & New Mexico book.

This is the home page for the series. Where you can also order the book.

Mark