For over 30 years George Williams' monumental 'The Radical Reformation' has been an essential reference work for historians of early modern Europe, narrating in rich, interpretative detail the interconnected stories of radical groups operating at the margins of the mainline Reformation. In its scope -- spanning all of Europe from Spain to Poland, from Denmark to Italy -- and its erudition, this book is without peer. Now available in paperback, Williams' magnum opus should be considered for an college or university-level course on the Reformation.