Book excerpt: Photographed over 20 years, this is a portrait of the Jesus Army. For most, they are the tambourine-wielding fanatics who intrude on our Saturday morning shopping excursions. But for the members themselves, this charismatic Christian sect - often dismissed as a cult - is a total way of life. Photographer John Angerson has a profoundly sympathetic authorial style that does not judge, or simply even chronicle, but seems to penetrate the very skin of a religious sect and provide a seering insight into fanatical religion. With an introduction by author William Shaw.