'This is an illuminating, beautifully written study of Britain's most highly publicized, durable radical Islamic group, which established numerous sidewalk stalls to engage passers-by. Kenney spent five years interviewing many group members of different ranks, as well as deeply knowledgeable outsiders, including academics, journalists, and law enforcement officials. No academic has had a deeper contact with a radical Islamic group, a connection that will benefit readers greatly.' David Rapoport, Professor Emeritus, University of California, Los Angeles, and Founding and Chief Editor of Terrorism and Political Violence