Maier, Paul L. Eusebius: The Church History (0825447216)
Next to Josephus, Eusebius is the most widely-consulted reference work on the early church. Much of our knowledge of the first three centuries of Christianity--the terrible persecutions, the courageous martyrs, and the theological controversies--come from the writings of this first century historian.
The hardcover edition of this new translation includes more than 150 color photographs, maps, and charts.