I have so many wonderful ones I can not narrow down favorites so I will start with the one I just finished:
100 Secrets of the Smokies: A Savvy Traveler's Guide (The Savvy Traveler's Guide)by Randall Duckett, Maryellen Kennedy Duckett (Paperback)
Some of the things in it are not much of a secret but are so good you do not mind them mentioning at all! Some of the places are gone. :(
They cover places to eat, stay, see. They give very good directions.
The book said they have a web site but I can not find it. I wonder if they do not have it any more.
I go to the library and get 10 or more books at a time on the mountains and then the ones I really like (most of them) I order from Amazon or ebay.