Ante-Nicene Fathers Volume VI
Peter of Alexandria: The Genuine Acts of Peter
This isn't so much about Peter of Alexandria as it is about Arius' backstory. And while we need to be somewhat skeptical (as with all ancient historical narratives), there's still some pretty good stuff here. Overall, this short work is fine and worth reading, especially the quite gracious and generous instructions on how to think about those who have fallen into the Arian heresy at the very end.