This book looks at the divisions within three mainline Protestant churches in the 1970s: the separation of conservatives from the Presbyterian Church in the United States (or Southern Presbyterian Church) to form the Presbyterian Church in America, the separation of liberals from the Lutheran Church Missouri Synod, and the separation of traditionalists from the Episcopal Church. As the author of the first history of the Presbyterian Church in America (which I am currently updating), I can testify as to the professional treatment which Bryan Hillis gives to the topic. I highly recommend the book.