Summary: An introduction to American Church history.
Mark Noll originally released his book Turning Points in Church History in 2001. (It is now in its 14th edition.) Elesha Coffman is writing a United States-focused version with the consent (and introduction) of Mark Noll. Noll is approaching 80 and still has the third in his history of the use of scripture series and several other books he is working on, and he says in the introduction that he didn’t have the time or interest to do an American-focused turning points book.
As with any type of book like this, the choices of what are the turning points matter and will be debated. I think that this choices were good. She started with the Spanish Armada, which she framed as a starting point for English colonialism and a shift in global power. I might have started with the rise of Puritanism or the English Reformation, but all three of those starting points are related and led toward the English colonies in North America.
Coffman did a very good job contextualizing the different turning points. In this type of book, the turning points are a frame for looking at an era of history not just the thing itself. So Azusa Street Revival was not just about that event, but about the rise of the Pentecostal and Charismatic movements in the US and how they rippled through not just those denominations but also impacted Catholic and Episcopal charismatic reform movements as well.