Chris Ryan's time has come. For years now, the ex-SAS writer has been turning out flint-edged, fast-moving novels without a trace of subcutaneous fat: barrelling narratives that handled characterisation with extreme economy (too much economy for some tastes), but never cheated on the pulse-accelerating tension that is his hallmark. But with Blackout, Ryan's key subject -- the threat of terrorism to all our lives -- could not be more