Blaze brought a verification tool back to her class, and forty kids started using it. Then she found the flaw. It worked, mostly, and there was one specific thing it got wrong in one specific way, and by the time she understood the error, everyone had already built on top of it.

What she does next is the whole book. She does not find the error and quietly fix it. She stands up in front of the class and names it: I was wrong about this specific thing in this specific way, here is the correction, and here is how to recheck anything you verified with the broken version. Corrections are not failures, the book insists, they are part of the method. Devon is the kid who felt something was off for months before he had the words for it, and his question drives the story: what if the thing doing the checking is also wrong? The answer is not that checking is futile. Check from more than one direction, document what you cannot confirm, and make the method visible so other people can improve it.

Book Two of the Wild Tiger Series, for readers roughly six to twelve, it is a story about being wrong and what you do afterward, with a method a class can actually use. It is written for every kid who was told they did not understand something well enough to question it. They understood it fine. They needed a framework. 189 pages.