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# Why AI-Written Books Fail – and How We Made Quality Measurable


- **Date:** Thursday, Sep 24, 2026
- **Time:** 14:50–15:20 (30 min)
- **Room:** Stage 3
- **Event:** World Congress 2026 North America

## Description

Anyone can generate 40,000 words with an LLM today. Almost none of it survives contact with a reader. At story.one, we generate complete non-fiction books – 17 chapters, printed and sold in real bookstores – and over the past 18 months we read and scored more than 1,000 of them, cover to cover.

This talk is the engineering story of what we found. Why long-form generation fails in ways chatbot demos never show: phrase tics, structural repetition, fabricated quotes, visible seams between regenerated passages. Why the model is the smallest part of the problem. And how we built a release standard around a neurosymbolic idea: fast neural generation, slow symbolic verification – deterministic checks in code (quote verification against original sources, style-pattern detection, structural gates), blind evaluation with fresh context, and a nightly regression suite of real-world cases.

You will leave with three transferable lessons for any long-form GenAI product – and you will see a book that was generated, verified, printed, and sold the same day.

## Speakers

### [Hannes Steiner](https://www.wearedevelopers.com/@hannes-steiner)

CEO and Founder of Story.one
### [Thomas Neumayer](https://www.wearedevelopers.com/@thomas-neumayer)

CEO of ExtensityAI


## Related talks at this congress

- [The reviewer can't be the author: independent verification for AI-generated code](https://www.wearedevelopers.com/events/world-congress-2026-north-america/sessions/1822-the-reviewer-can-t) — Manish Kapur
- [Keeping Code Quality at AI Speed](https://www.wearedevelopers.com/events/world-congress-2026-north-america/sessions/1860-keeping-code-quality) — Daksh Gupta, Arthur Hicken, Brian Mann
- [The Broken Rung: How AI is Rebuilding Software Development from the Ground Up](https://www.wearedevelopers.com/events/world-congress-2026-north-america/sessions/1744-the-broken-rung-how) — Tomislav Tipurić
- [Building Stuff with GenAI - The Open Minded Workshop beyond OpenAI](https://www.wearedevelopers.com/events/world-congress-2026-north-america/sessions/1719-building-stuff-with) — Andreas Erben

## Watch remotely

Can’t make it to San José? Watch this session live with Pro. You also get:

- All full videos, bookmarks, and playlists
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[See pricing](https://www.wearedevelopers.com/pricing)

## Links

- [Get tickets](https://www.wearedevelopers.com/world-congress-north-america/tickets)