Tour of Christian History
Schaff, Philip. The Teaching of the Twelve Apostles. (3rd Edition, Revised and Enlarged) New York: Funk & Wagnalls, 1889.
We have previously walked through this book, in its second edition from 1886. According to Schaff's preface (Schaff 1889, v.), with the exception of "a few minor corrections," the book is unchanged but for an addition of a second appendix updating the bibliography of scholarly work from 1886-1889, as well as some additional entries in the index.
I remain impressed by the speed with which Schaff was able to prepare such a significant scholarly work. However, since the content is largely unchanged except for materials readily available in a bibliographic search, we will allow previous comments to suffice.