General AI knows the world but not your business. This book shows you how to change that with RAG — retrieval-augmented generation — so an assistant answers from your documents, your policies, your knowledge, and cites its sources. It is the difference between a clever stranger and an assistant who has actually read your files.
It's honest that this is a step up in complexity from the rest of the series: understanding what RAG actually is, when it's the right tool versus fine-tuning or better prompting, and the real work of gathering, cleaning and preparing your own documents so an assistant can use them properly.
It closes with the parts that separate a working prototype from something you'd trust: evaluating whether answers are actually accurate, improving retrieval when they're not, keeping the underlying knowledge current, and the privacy, security and cost questions that come with putting your own data behind an AI system.