This audiobook is narrated by an AI Voice. Eleven of the most widely taught prompt engineering techniques were run against a control that gave no instruction at all. A single sentence about a Tuesday afternoon.

Not one of them beat it.

Think step by step. Take a deep breath. You are an expert. Please. I will tip you. Every one of them arrived in working practice as something everybody knew, and not one arrived with a number attached. So they were measured properly: the same tasks, the same graders, three repeats each, every call isolated, and a control designed to look exactly like a technique while instructing nothing.

Eleven techniques went in. None came out ahead on accuracy. Seven of them significantly damaged the shape of the answer, which is the part your code depends on. The single most recommended instruction in the field took responses that were clean every single time down to fewer than one in three.

This is not an opinion piece about AI hype. It is a measurement programme with the trial data published, the graders published, and the gates that had to pass before any of it was allowed to run. Where the author's own instruments turned out to be wrong, that is in the book too, with the numbers it changed.

If you have ever added a phrase to a prompt because somebody confident said it worked, this is the book that tells you what it cost you.