Introducing a GREAT resource:  Early Christian Writings

Early Christian Writings is the most complete collection of Christian texts before the Council of Nicaea in 325 AD. The site provides translations and commentary for these sources, including the New Testament, Apocrypha, Gnostics, Church Fathers, and some non-Christian references. 

If you want to read ANY work from the first 325 years of church history, you will find it at this site.  Free.