There isn't really that much I can say about this. If you've read any Dan Brown books before (and I know most people have read The Da Vinci Code at some point), you'll know what to expect... Encrypted messages, dramatic chases through a city at night (in this case it's Washington), discussion of conspiracy theories, and a deranged bad guy; and everyone thinks obvious things in italics an awful lot. I did really quite like The Da Vinci Code in a dumb thriller/action movie kind of way, and I thought this would be more of the same, but somehow it seems to lack the sheer enjoyability factor of Brown's best-known book. Perhaps the source material just isn't as interesting or something, but it never quite seems to get going, although there are a few edge-of-the-seat moments and it passes the time well enough if you've got nothing else to read. The ending is pretty bad, though - I think it's supposed to be meaningful, but it just reads like a load of mumbo-jumbo - and the 'big twist' is SO obvious you'll guess it less than halfway through even if you're not concentrating.