Shenkman has a gift for digging up interesting events and facts about history. In this case, the material is presented as a long string of anecdotes, organized about as well as one can organize such a collection. It's often humourous, it's usually enlightening, and it's full of the irreverence with which we should be viewing the 'official' version of US history.
Unfortunately, its conclusions are at times debatable, so while it is valuable as a historical study, it is by no means definitive. Before you cite Shenkman on any point, I would look up his sources and satisfy myself as to context and credibility. To Shenkman's credit, the sources are referenced, so one can do just that if one feels motivated.
Recommended, especially for people who profess to hate history because of the way it was taught. That, at least, Shenkman can probably remedy--there's nothing to hate about the way Shenkman relates history.