Ok well it isn't a new book, its an old book I got off ebay. Its called Exploring American Caves: Their history, geology, Lore and Locations: A Spelunkers Guide. It was published in in 1956 and 1962. Just thumbing threw it it looks intersting. It has a list of NSS grottos in the back with contact info and the cave location section is by state and lists caves that are open to the public. I'd be curious to see if some of them are still open.
If anyone is interested in borrowing it once I am finished reading it, let me know.