Books

Short books on building AI you can rely on

Written for people who have to make decisions about AI systems rather than train them from scratch. No prompt templates, no mathematics, no code. The mechanism, the failures it makes inevitable, and what actually reduces them.

Cover of Why AI Gets It Wrong
Cover of Why AI Gets It Wrong by Ferrol Jeromy
First edition, 2026

Why AI Gets It Wrong

Understanding the machine before you build on it.

An airline was ordered to pay for a refund policy its chatbot invented. A legal brief cited six court cases that did not exist. Neither failure looked like a failure. Both read like every correct answer the system had ever produced.

This is a short book about why that happens, what it costs, and where the leverage actually is. Not prompts. Not tools. The environment you build around the machine.

  • Why fluency tells you nothing about accuracy
  • How language models work, without mathematics or code
  • Six failure modes that look identical on the surface
  • The Context Four, a diagnostic you can run in a minute
  • What these tools do to the judgment of the person using them
Buy the PDF37 pages. Readable in an evening.

What comes next

The first book is the foundation. The work that follows extends it into the parts that decide whether a system survives contact with real users.

Evaluation
How you know an answer is right before anyone acts on it, and how you measure that repeatedly.
Retrieval
Context chosen automatically, and why retrieval quality caps the quality of everything above it.
Memory and tools
Context persisted, and context fetched on demand. The same principle at a larger scale.
Agents
Systems that assemble their own context and act on it, failing in the same ways, faster and at greater cost.