Berns' book is likely better than my rating, but it pales next to Taking the Constitution Seriously, which is older, more complete, and more interesting in some ways. In this work, Berns repeats many of the same themes, so, for me, the later book suffers by comparison.
Berns seeks to explain how patriotism in America works. As a "new" kind of republic, the government is limited in its ability to create virtue, but our social compact assumes a certain level of citizenship, or public-spiritedness. We are a creedal nation, born under a set of principles. Those principles must be taught--again, and again, and again. This is the only way we will survive.
I like the book, but the longer one is better and more thoughtful.