What is the theme in Godric by Frederick Buechner?

Traditionally, writing about the lives of saints was something only done by Catholics. It is interesting, then, that Buechner, a Protestant, would write a book about a Medieval Catholic holy man like Godric. As the book progresses, it becomes clear that part of Buechner's purpose in writing "Godric" is to show a different, "new" kind of saint which other hagiographers, like Reginald, have failed to adequately capture. Of course, Buechner does not really think that he is creating a new kind of saint; Godric, after all, had been dead over eight centuries at the time of this book's publication.