A good summary of Lutheran soteriology, explaining the doctrines of sin, the means of grace (word and sacrament), the responsibility of parents and the church in training children (esp. in terms of catechesis), conversion, justification, sanctification, and a somewhat random but nonetheless engaging critique of certain revivalist movements. This book is not academic in nature, written at the popular level for the laity. In that sense, it is less of a thorough defense/apology and more of an explanation or introduction. It also has that enrapturing zeal that most older books have (modern writers: bring that back!). The author even quotes stanzas from hymns at the end of each chapter. I will provide a couple of my favorite examples of this style below.
“And further, if there is any risk of being mistaken—which she, however, does not admit—she would rather run that risk, by taking her Master at His word, than by changing His word. In childlike confidence and trust, she would rather believe too much than not enough. She would rather trust her dear Master too far than not far enough. And therefore here she stands; she cannot do otherwise. May God help her! Amen.”
"And why should it offend us that our dear loving Saviour comes so close to us, leads us into His banqueting house, where His banner over us is love, speaks to us words that are the out-breathings of the yearning love of His divine heart, and, at the same time, feeds us with His own spiritual and glorified body and blood, and thus makes us partakers of the divine nature."
"Sailing thus under the colors of scriptural doctrine, we steer clear of the Scylla of Calvinism on the one hand, and also escape the Charybdis of Arminianism on the other."
Last but not least, my favorite line that I fully intend to use when discussing CCM: "singing of choruses of doggerel verses to the most frivolous tunes"