AI books make up 20% of Amazon self-published titles but earn only 12% of revenue

The Decoder · rss · 2026-08-15

A new study reveals that AI-generated books now account for 20% of Amazon's self-published catalog but generate only 12% of sales. More critically, revenue per book is declining for human authors in seven out of eight genres. These findings provide concrete market harm data that copyright plaintiffs have been seeking in their legal battles against AI companies.

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