I've referred to The Perfect Loaf (https://theperfectloaf.com) a bunch of times here since I think the information there is first class and the posts are very clear and complete. But sometimes you want book to kick back with. Well, Maurizio, the guy who runs TPL, just released one - https://www.amazon.com/Perfect-Loaf-...f_=as_li_ss_tl
I looked it over at the bookstore and it's excellent. Just as clear as his site, chock full of good info and really well produced. If you've been wanting a book that's focused on sourdough baking, this should shoot to the top of your list.
