It's a fine book. My learning after that book was to try to ask for and read the checklist for medical procedures my family members undergo. At least over here (the Netherlands) they are usually given without problem or even publically accessible online. In case of the chemo of my father, I was able to point to missed steps twice, once needing immediate intervention. In case of simple family disease I can at least understand the reasoning of our GP without totally cross-examining him.

In work I've only once (alas) hit the sweet spot of having team members being able and willing to define their own checklist and following and refining it regularly. The results were pretty great (30x efficiency gains on the same procedure in two years). Since, I've noticed quite a lot of professionals being resistant to the idea of checklists. The dogma is that you can't capture skill, experience and intelligence in a checklist. That's a false dichotomy, since the checklist is ment to save you from embarrassing errors, but it's a persistent thought.