>>591248
It's like 500+ pages and there is about a paragraph devoted to summarizing the tl;dr of every major turning point in Church history. It's so wide in scope it might not be as focused as what you're looking for but it's a great starting point for learning more. I canceled my subscription to formed.org a while ago because I needed to cut down on subscription services but it's like $10/month and you can download a ton of ebooks for free that you can read even after your subscription is canceled.