The one in AZ must be difficult to complete. Such a big state! How many towns are there?
I honestly don't have a clue. The book I have was written by a newspaper feature columnist, as I recall; it was a compilation of his output over several years.
I"d start the same project for Hawai'i, but at the moment inter-island fares are such I'd have to limit it to Oahu. ;)
The water ain't that warm!