Had I stayed in Colorado, I thought about working on a Hummer book out there for the trails, because I was unhappy in some ways with the books that are out for Colorado (one being in this series). My idea was somewhat different than what these books do, but I'll keep that to myself in case I ever want to persue it...
I had compiled a few notes, but never got very far before I came back East. I think someone should do it. It's probably a worthwhile endeavor.
I think I found my books on Amazon.com BTW. They're a lot cheaper that way.