The Great American Road Trip: U.S. 1, Maine to Florida by Peter Genovese
I’ve always been fascinated by Route 1. There’s just something wonderful about the idea of a single ribbon of highway stretching between the Canadian border in Maine and the tropical pleasures of Key West, Florida.
Published in 1999, this great guidebook is a little dated, but it’s still the most useful book on the topic, as well as fun reading! There are also lots of pictures, both black and white and in color, that really capture the beauty, the magic and the wonderful weirdness to be found along the road. The Amazon page includes an interesting interview with the author.