'In the rush to understand the Islamic State, al-Qaeda has been largely ignored in recent years. As Donald Holbrook's excellent and important book shows, this is a mistake. Holbrook examines the strategic thinking of al-Qaeda under its leader Ayman al-Zawahiri with care, rigour and insight. This is a book which will enlighten and inform all students of Islamic militancy, inside and outside government, veteran or novice, the specialist and the general reader alike.'