Not a life changing book, but an extremely readable one. Good reference, reasonably laid out, with concepts clearly (if cursorily) explained. That's the m.o. of the Dummies series. Recommended for quick reference, or for someone who wants a very thin into to Freemasonry, but doesn't want to spend much time on it.
Loses points for saying, a couple of times, that Freemasonry was born from stonemasons' guilds. You know, those chisel-happy fanatics that made you swear under pain of extraordinary forms of death if you revealed their secret stone...secrets. No one writing books should be using that throw-away explanation anymore. C'mon, dude.