Having spent several years working just a few blocks from Mike Mill's restaurant (and eating away a few paychecks over those years), I had to get peace, love, etc. I liked it. It was a good book, it had some history relevant to my neck of the woods. I don't believe the sauce or rub recipe is what is served in the restaurant. I don't agree with everything in it.
Right now I don't think bbq is about books. You know the basics already. Past that its practice and experience. Find what works for you, your tongue, and your cooker. Own it and make it yours. I can't say with certainty but I don't think I'll be buying anymore books. My bbq will never be your bbq, no matter how delicious yours is or how closely I try to follow you. Know the basics of what to do and narrow it down. Ymmv.