{"slug": "the-rise-of-ai-written-fiction-book-sales-on-amazon-2023-2026", "title": "The rise of AI-written fiction book sales on Amazon, 2023-2026", "summary": "A new study analyzing 14,419 self-published genre fiction ebooks on Amazon found that one in five books now contains substantial AI-written text, and the average human-written book earns less per title than in 2023 in seven of eight genres. Researchers used Pangram full-text AI detection to classify books and found that the more AI books enter a genre, the more ground non-AI books lose, with their hold on top-chart spots sliding from 88% in least-AI genres to 63% in most-AI genres. The paper, which speaks to copyright litigation in Kadrey v. Meta, shows that AI-written books reuse rare phrases at twice the rate of successful non-AI books and often have verbatim overlap with other AI books.", "body_md": "🚨 New paper on AI and Copyright 🚨\nIt's easy to dismiss AI-written books 📚 as slop nobody buys. So, armed with full-text AI detection from\n\n- How we did it 📊: We randomly sampled 14,419 self-published genre fiction ebooks (less gatekeeping and low barrier to entry) and ran Pangram on the full-text to classify each book as substantial AI (>25%), light AI (<25%) and no-AI(0%). Then we matched each book to aBooks with substantial AI text are now everywhere: 1 in 5 books in our sample, across every genre - romance, thrillers, sci-fi, all of it. The typical book written with AI sells far fewer copies than the typical non-AI one. But there are so many of them that as a group they'veHere's the imbalance at the heart of the paper. Over 3 years, the books catalog grew 38x cumulatively. The book's revenue? Only 9x quarterly. Way more books fighting over a pie that barely grew which means the average book earns less than it used to. (4/n)\"Sure, but doesn’t it mean that cheap AI books are dragging the average down?\" No, and this is our key result. No-AI books, on their own, earn less per book than they did in 2023 in 7 of 8 genres. The one genre where human authors are doing better (+35%) is Fantasy/horror whichThe more AI books enter a genre, the more ground non-AI books lose. Their hold on the top-chart spots slides from ~88% in the least-AI genres to ~63% in the most. And it's the worst in Kindle Unlimited-heavy genres since KU readers draw from one shared subscription pool, so everyThe million dollar question : Who's producing these books? Authors who, once they started producing with AI, didn't stop but instead accelerated. Among those who kept at it, 3 in 4 published faster than before, some hitting dozens of books a year. The monetary earnings areAnd the AI books that succeed share a signature. They contain noticeably more rare phrases that already appear in published books than successful non-AI books do.Award-winning literary fiction, for comparison, reuses rare phrasing at less than half their rate. (8/n)What’s funny is that AI is causing mode collapse :) A lot of AI-written books have verbatim overlap from other AI books. Can this serve as an alternative evidence to AI-detection skeptics ? (9/n)👨⚖️ TL;DR: AI doesn't need to write high-quality books for non-AI book writers to get hurt. Cheap books at massive volume are enough and they've cut what the average human-written book earns in most genres and pushed human titles down the bestseller ranks. (10/n)Our results also speak directly to a copyright question that is being litigated right now: whether AI outputs compete with the very works the models are trained on. In Kadrey v.\n[@Meta](https://x.com/Meta), Judge VinceChhabria spoke about market dilution and flagged this as the harm that could beOur paper can be found at the link below :[arxiv.org/pdf/2607.20349](https://arxiv.org/pdf/2607.20349)Anonymized data and code coming soon. Stay Tuned. Many many thanks to friends at[@pangram](https://x.com/pangram)[@max_spero_](https://x.com/max_spero_)[@kthai1618](https://x.com/kthai1618)[@bradley_emi](https://x.com/bradley_emi)[@jennajrussell](https://x.com/jennajrussell)for their encouragement and support with this research 💕 # Join the conversation", "url": "https://wpnews.pro/news/the-rise-of-ai-written-fiction-book-sales-on-amazon-2023-2026", "canonical_source": "https://twitter.com/TuhinChakr/status/2082124139973030095", "published_at": "2026-07-29 03:20:50+00:00", "updated_at": "2026-07-29 03:52:35.932422+00:00", "lang": "en", "topics": ["artificial-intelligence", "ai-policy", "ai-ethics", "generative-ai", "large-language-models"], "entities": ["Amazon", "Pangram", "Kadrey v. 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