If you've published through Kindle Direct Publishing in the last year, you've felt the ground move. Amazon spent 2025 and 2026 quietly rewriting the rules for how AI is disclosed, how books are found, and even how readers download what they buy. None of it was announced with much fanfare, and most of it landed as a forum post or a new checkbox you had to discover on your own. So here's a plain-language guide to the three changes that matter most, what they actually require