This is one of those books that from the outset, I'm "rootin'" for. It was an extremely quick read (it took me all of one afternoon and evening).
However, I do have to point out some issues with it. The book obviously did not have an editor (yes, I do have a tendency to read with an eagle's eye). I found several typos and there were no footnotes anywhere. The bibliography was downright laughable (though it pains me to say it)--nearly half the entries were from Wikipedia and they were in no type of professional format that I could tell.
It also seemed to me that the book was written for a younger audience, maybe teenagers. This makes sense because one of the authors taught junior high (I believe). However, this was not stated anywhere as the intended audience. I found several instances were, as an adult reader, I felt I was being condescended to. (Of course, this could have also been the authors' attempt to be "cute"--whatever, it didn't work for me--but I read on.)
So where does this leave me? Yes, I will undoubtedly add this book to my local history section of my personal library. However, I'll be wary about using it for anything academic because I simply can't vouch for it as a source.
Fun read? Overall, yes.
Educational resource? Um, no.