“In scope and detail this book has no equal in the English language—or perhaps any language for that matter. […] without doubt the best available in its field.”C. Arnold Snyder, Conrad Grebel University College. In: The Mennonite Quarterly Review, Vol. 91 (July 2017), pp. 428-432.“This Companion can be recommended as a succinct point of orientation for all students and researchers with interest in the Swiss Reformation.”Beat Kümin, University of Warwick. In: Journal of Ecclesiastical History, Vol. 68. No. 4 (October 2017), pp. 869-871. “incredibly valuable to scholars […] the essays synthesize and present in English much of the recent research on the Swiss Reformation that has been written in French and German […] it is worth pointing out that in addition to the sophistication and scholarly value of the essays, this collection contains numerous maps and images, many in color, which is a rare treat for academic readers.” Carrie Euler, Central Michigan University. In: Renaissance Quarterly, Vol. 71, No. 1 (Spring 2018), pp. 361-362.