El País checks 119 bestsellers for AI use, confirming AI's spread in self-publishing

TuhinChakr · x · 2026-10-13

Spanish newspaper EL PAÍS ran a concrete sampling study on 2025–2026 bestsellers: it examined 119 popular books appearing on Amazon and Casa del Libro bestseller lists plus a major literary prize's winners, verifying traces of AI involvement in their writing.

Tuhin Chakrabarty, author of the underlying study on AI use in Spain's self-publishing marketplace, called the report a "fascinating reproduction" of his work — academic findings now corroborated by a mainstream outlet with specific titles, showing AI-generated content flooding the mass book market.

Related event: Spanish Newspaper Tests 119 Bestsellers, Finds Fewer AI Traces Than Expected(2 posts)→

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