This book definitely has the flavor of
The DaVinci Code by which I mean it is about a mystery hidden within an obscure Renaissance text (as opposed to a well known Renaissance painting) and the hunt is on to solve riddles and decode the authors actual agenda. In theory it's an interesting concept. And I definitely liked the little tidbits of knowledge that I picked up about the Renaissance. But in practice ... I don't know. The book just kind of bugged. There were too many characters that I didn't really care all that much about, there were too many plotlines that seemed thrown in just to help wrap up the main plotline (which, ok, happens in other books and doesn't bother me but in this case it was like being beaten over the head and also so loosely woven I could poke a million holes in the logic) and there was too much information that just really didn't tie together for me.
And seriously, I am a big one for procrastination, but even I can't imagine being in the (albeit final) research stages of my FINAL THESIS that I have to hand in to graduate TWELVE HOURS before it was due. And if I was in such a predicament I hardly think I would be running around in restricted areas and eating a leisurely supper and going to Easter Vigil and worrying about mysteries from 20 years ago. I would probably be thinking "screw more research I'm going to run with what I have" and then I would be typing like no man has ever typed before. Because seriously he could have gotten away with a much less in depth paper and then continued his research for a graduate or phd program. If the book had already waited 500 years for someone smart enough to come along to solve it probably another 2 years is not going to hurt.
The plot kind of meandered around as well. Now we're in the present, now it's a few months ago, now it's 4 years ago, now it is a lot of backstory, now we're in the present again, still running around NOT working on our paper. Gah.
If you're looking for a quick, moderately entertaining read that you aren't going to think about too much this is not a bad book. But as soon as you start analyzing it at all you will want to shoot yourself because there are so many cans of worms to be opened.