Definitely worth a read. It seems to be quite expensive now. I was lucky to get it for 1,27€ as Kindle edition last year (just looked it up in my past orders) in March when there was a promo at amazon. Now the book is 14,99€, yikes!
Davis is also not the only bariatric surgeon who comments on the favored LCHP diet. Weiner also criticizes the obsession with "lean animal protein". His book "a pound of cure" is worth a read, too. (Available on Kindle Unlimited for free at the moment.)