A lot of fun - propulsively plotted. Only flaw I can find on first go-through is that the unpredictability is taken to such lengths it becomes a bit predictable - no matter what the heroes initially plan, you know it's actually going to turn out a different way. On the whole this works more as a strength than as a weakness, though. 
 The climax in particular is especially gripping. A good end to this trilogy, with more in the way of political realism (of a kind, that is) than you sometimes see in genre fiction. More than you often see from people in real life, for that matter. On the whole consider it well recommended.