On the Apostolic Tradition
St. Hippolytus
Though it may at first glance to be overly "scholarly" for general reading, this is indeed a crucial document for understanding of the early roots Christian liturgical practice in the (of course then Orthodox) West. It may be most useful to first read the text proper through, skipping over the extended interpolated commentaries � then go back to the commentaries for sections of particular interest or puzzlement. Perfect-Bound