Books such as this usually only cover things that are of interest to the masses -- so it can sell copy. There are literally thousands of roads in this country that Mr. Summerson has never heard of or been on. Here is just one of the reviews.

"So if you are that dude or dudette who is seeking to climb some of the craziest passes in the United States and don’t know how to go about it, then you need this book. Consider it the Bible if you will, because it has all the major road climbs and details about each from Lincoln Gap to Brasstown Bald. All the details are there: total elevation, average gradient, length and category. A few scenic shots are included as well as a map of the surrounding area so you can actually find the road. It’s a cool book that should be kept in your glovebox, or in your back pocket if you are that crazy to seek each one by bike. Mmm… Not a bad idea! - Road Magazine"