Most of us don't know anything about the early Church except that St Paul was around at some point. But we should do.
Those well grounded in the faith, and prone to reading the scriptures, could perhaps complement their spirituality with this work, which contains writings from Ss Clement, Polycarp, Barnabas and Ignatius. We often don't hear of these people, who were as important in keeping the Church alive in this bloodstained years as were their forefathers.
It also contains the Didache in the back, which is quite useful in placing early Christianity in the context of the contemporary Jewish religion and practice.