Zenith Angle was perhaps cursed by being marketed as a post 911 novel when, typically, Sterling had already written the best of all post 911 novels, Zeitegeist *before* 911. Zenith Angle is a curiously unresolved book, neither thriller nor satire - if it was cinema you'd suspect that the director, studio, and writers had all been trying to make very different films. If you haven't read Sterling - perhaps the best living SF author - before start with Schismatrix (avantegarde punk space opera) or Zeitegeist (politics and deconstructionism) or Distraction (truly literary SF)