Brandon J. O’Brien. Ada, Mich.: Bethany House, 2010. 171 pp. (Paperback). According to author Brandon O’Brien, 177,000 churches in the United States have fewer than 100 in attendance on any given Sunday. He cautions that before you shake your head in sorrow, you might consider that the megachurch is not the New Testament model. Instead, writes O’Brien, perhaps we should…