Ms. Matthewes-Green is first an unparalleled writer. Concise, delicate, nuanced, she can navigate complicated, and foggy, territory that most would struggle with. In this book, she has taken a mysterious, closed sect of Christianity and shed marvelous light upon it. For once, a book that I found readable, that introduced me to an unfamiliar subject , and at once massaged the language center of my brain. I'll read her again, soon! ( )