"Louisa A. Burnham addresses a uniquely significant but hitherto neglected chapter in the history of popular religious movements in the Middle Ages: the Beguins of fourteenth-century Languedoc. Her research unveils a community of believers straddling the fringes of orthodoxy and dedicated to preserving the controversial apocalyptic teachings of their spiritual father, Peter John Olivi. Burnham's description of the bonds of fellowship among a generation of dedicated believers, and their resistance tactics when forced underground by persecution, is composed with uncommon compassion and scholarly acumen. Rich in historical detail and in intimate human portraits, So Great a Light, So Great a Smoke provides both a history of the Beguin movement as a whole and a moving reconstruction of the lives of individual men and women struggling to maintain their beliefs and survive in the face of repression."