Introduction to the New Testament - Volume 2 - Theodor Zahn

Theodor Zahn (1838 - 1933) was a German Protestant theologian and a biblical scholar at the University of Erlangen. He was distinguished for his eminent scholarship, especially in connection with the New Testament canon. He stood at the head of the conservative scholarship at his time. 

Volume 2: The Epistles to Timothy, the Epistle to Titus, the Epistles of Peter, the Epistle of Jude, the Epistle to the Hebrews, the first three Gospels, Acts.