Nathan Busenitz's "Long Before Luther" is a good overview of church history from the perspective of reformation doctrine. However, I expected the author to include more historical context, and the majority of the book reads more like a college essay than an academic book for the lay person. And much of the content is repetitious. I did appreciate that Busenitz made it a point to define the doctrines at stake before moving forward, and that he actually included some excerpts from early church fathers' writings at the end of the book in addition to the many quotes he uses throughout the book. The subject matter is certain important, and the first few chapters alone make the book worth a read, but I imagine there are better books out there that address the questions more thoroughly.
*Disclaimer: I received this book for free in exchange for my honest review.