The clearest explanation for how this works is in the top article on the pub. That article is "How 'Reviews for Medium Featured Books' Works." After you read that, you can go to each article in the list on the main page and just follow along. It is true that you need an Amazon account to leave a review for anything, and that you need to have spent some money on Amazon also; I don't remember how much.

I see your featured book at the top of your profile page, and I also see that you've used Chat GPT to help write it. Do feel free to join Reviews for Medium Featured Books, but I don't know that you will be well read or reviewed by Medium writers, I think most of whom simply will not read an AI text generator.