I just received the book Roadfood, 10th Edition by Jane and Michael Stern. It's great! I wish I had thought to write a book like this, so I could justify traveling across the country and eating great food!
They compiled a list of top 100 restaurants across the country, as well as must-visit restaurants for each of the states. Restaurants are ordered by region, then by state. There is not a listing by city. There is also a visual overview with restaurants starred on a map of each state.
I found some of my favorite restaurants that I've visited around the country, as well as some new places I want to try in my area. I also enjoyed looking at cities that I'll be traveling to this year, to see which venues I need to put on our calendar.