I have replaced the reading material I had on display downstairs. It has occurred to me that none of us know nearly as much about the history of our Church as we should. So, I was looking through books on my own book shelf and managed to find at least 10 having to do with Church history, among which is a paperback of Eusebius, which is a real old historian dating back to the 4th century. The translation is quite good, but be sure to read the forward to the text.
There are others which are far more contemporary, but if they seem a little long, go for Church History 101. It is short, obviously just skimming the highlights, but each chapter begins with a time line, and if you do nothing else, take a look at those. Interesting.... Good luck, and keep reading!