The book should contain all 2048 words from the BIP39 list. I don't think it's worth all that effort. Furthermore, even if the book contains almost all the words that make up your seedphrase, you'll still be missing 4 to 6 words. You'll need to find another way to make up for this gap.
I also dislike this method, as I explained above, but why should the book contain all 2048 words? I believe it should only contain the 12 that you 're using in your seed phrase. It's also obvious that you should mark a number near the word to indicate which position the word is. Because for example the fourth word could be on a later page than the ninth word etc.
In this case, using a dictionary would be a great choice if you are looking for all 2048 words. But that seems like too much, imo. That's why I agree with apogio here, what we need is a book that contains my seed words! There's no need to carry around a thick book, just a novel would be enough. The challenge lies in finding a book that has these 12/24 seed words. Unless you’re a writer yourself, it could be quite difficult task finding it.
Figuring out the order number would be up to the user who chooses this method. You could write down the page and paragraph number or use other methods to indicate it! One could also use color combinations, the possibilities are endless here!