This book was a pretty enjoyable read. The chapter endings and expository text were unnecessarily formulaic--at times painfully so--but that actually got to be kind of charming, after a while. The puzzles and logical leaps were entertaining, if somewhat implausibly executed (seriously--very minor early spoiler--is the Fibonacci series not something EVERYONE learns about in math class? I remember a Donald Duck video that mentioned it...), though I was kind of disappointed in the last one, which was upsettingly obvious. Worse, he reused a plot device he'd already used to stretch the reader's credulity earlier, at the SAME TIME. So that was lame, but the book as a whole was still fun. And far more accessible than Holy Blood Holy Grail, which I'm still only halfway through.

It wasn't meant to be an intellectual treatise; don't read it like it is one, and you'll likely enjoy it.