Both admirers and critics have called Michael Sattler the most significant of the first-generation leaders of Anabaptism. This collection of documents by and about Sattler, with introductions and extensive notes, makes selected primary source material available in English for the use of students, pastors, teachers, and interested readers. It is the first volume in the Classics of the Radical Reformation, a series of Anabaptist and Free Church documents translated and annotated under the direction of the Institute of Mennonite Studies.