Inferno

Predictable. I'm convinced that Dan Brown thinks he has a formula, and that every adventure he sends Langdon on will follow it - only it's not a perfect formula. This time, the history and insight to art and symbolism is eclipsed by the twists and turns that you can see coming. By page 200 you're hoping it ends or that the catastrophe Langdon is trying to save the world from - will actually kill him and Brown's formula off.