A fit ending to the book, I think. Of course, a knowledge of church history isn't necessary for transformation to happen. But I would argue, as did Rea in the book, that your Christian walk will be deeper the more you are aware of the saints who went before. And, I would further argue, you shouldn't stop at the Reformation; there are many saints in the 2000 year history of the church who would serve well as role models. (Of course, the obverse is true as well!)
Next book up: Bonhoeffer as Youth Worker. Should be an interesting read...