Checklists good – this message has been spread through all tech conferences for the last several years, so I didn't expect much from this book. It's the slightly more fleshed-out (but also just inflated) version of the original essay. If I hadn't heard all the good conference talks about pilot checklists (for example https://rixx.de/blog/andrew-godwin-you-have-control/), I'd have rated this book higher.