Whatever your preference in American food, Eat Your Way Across the USA has it. The Stern's favour places with local atmosphere and regional specialities. Using their guide, you will completely transcend the sameness of chain dining, and avoid spots that take advantage of travellers. You will save, too, as most recommendations are the inexpensive cafes and restaurants that locals love. Even the guidebook is very inexpensive.
Descriptions are excellent.
You will learn what's best the eat at each place and when to go. Ease of use has been significantly improved with this edition. All areas of the continental U.S. are covered.