I ran into this recently... It is a collection of Reformation Sermons published in 1908 by the Iowa Synod. Most of the sermons seem to me, at least to have been given to a Luther League gathering, or something like that. They are a celebration and also a demonstration of a pietistic view of Lutheran identity that while not mine, is probably an accurate reflection of the views of many Lutherans - then and now.
It was a quick read and fairly quick to form into a pb. Source was https://archive.org/details/surewordprophec00unkngoog which actually was taken from Google Books.
SDG
Ken McGuire