Like others here, because I pre-ordered the book, I'm receiving emails from Diana Rodgers. The most recent offer is to submit the receipt from the book pre-order and reap some early benefits such as eBooks: an advanced chapter from the book due out on 14 July, recipe book from Robb Wolf, detailed video interviews with people like Sarah Hallberg, Aseem Malhotra, and others, an early preview link to the movies that's is in production, and a variety of discount coupons to lc and keto-friendly companies. I simply sent a pdf of my amazon receipt and was provided with a password to access all of the above and more.