I haven't read it, but I've heard Meathead's book is a great resource: https://www.amazon.com/Meathead-Science-Great-Barbecue-Grilling-ebook/dp/B01FX1AUNC/ref=sr_1_3?keywords=bbq+book&qid=1568476341&sr=8-3

EDIT: I will say that if brisket is your number 1 priority, you probably won't get better than Franklin for guidance. I love brisket, but I also love pork so I like to venture out a little on that front.