This book is a brief and insightful reminder of 2,000 years of church history. Whenever I read church history, I’m reminded that, despite what we may think in the evangelical world, our churches are not mirror images of the church in the first century. Church history provides context for many of the theological debates that have persisted throughout history. For example, battles that Athanasius fought and won in the 4th century A.D. over the doctrine of the divinity of Christ, as well as Augustine’s battles over the doctrine of Sin in the 4th and 5th century A.D., are helpful resources in combatting modern day heresies (i.e., Jehovah Witnesses, Latter Day Saints, etc.). This book is a short, readable introduction on church history… If you’ve never read any church history, I would recommend starting here. If you want a longer and a bit more in-depth survey of church history, I would recommend Church History in Plain Language by Bruce Shelly (my church history prof at Denver Seminary).