Book excerpt: "Focusing principally on four of the most significant terrorist organizations of the last fifty years (al-Qaida, the Provisional IRA, Hamas, and ETA), and using a wealth of interview material with former terrorists as well as those involved in counterterrorism, [English] argues that we need a far more honest understanding of the degree to which terrorism actually works--as well as a more nuanced insight into the precise ways in which it does so"--Dust jacket flap.