This book could have been named "What A Bunch of Protestant Leaders Thought About The Seven Sacraments." It focuses on Martin Luther, but goes into great detail about what other pastoral leaders in the 16th century and even before that were doing to reform the church. The author did an exceptional job of showing how thoroughly Luther studies the seven sacraments in his lifetime. For example, Luther never seemed to reach a conclusion about what might have easily become a third Protestant sacrament, penance. Another excellent book on church history, and how our path to modern-day Christianity wasn't a smooth or flawless one.