Step inside the vibrant, intellectual world of the Reformation through the letters exchanged between two of its most pivotal figures: Huldrych Zwingli and Johannes Oecolampadius. This collection, translated and introduced by Nigel Harris and Sharon Van Dijk, brings to life the urgent theological debates, personal challenges, and shared vision of these giants of the Swiss Reformation. Their correspondence serves as a primary window into the formative years of Protestant identity, revealing their arguments on the nature of the sacraments, ecclesiastical governance, and the quest for unity in a time of deep religious division. Whether you are a scholar of the sixteenth century or a student seeking to understand the foundations of Reformed theology, this volume offers a unique, intimate look at the human and intellectual labour behind the theological shifts of the day. By engaging with these documents, you will gain a deeper appreciation for the courage and convictions that steered the Reformers as they wrestled with the Word, helping you connect the dots between past debates and the present-day Church.