1 in 5 books substantially written by AI now, growing from ~0% of sales in early 2023 to ~20%

TuhinChakr · x · 2026-10-13

A study of a book corpus estimates about 1 in 5 books contains substantial AI-written text, across romance, thrillers, sci-fi and more. Individual AI-assisted books sell fewer copies than typical non-AI ones, but collectively they went from 0% of sales in early 2023 to 20% today, and nearly a third of new bestseller-rank entrants now carry AI text.

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