I have been intrigued by Gareth Lock's "The Human Diver" program and insights into how human factors affect and lead to dive incidents since he developed a course on the subject. However, I was always on the fence on whether to take it. Partially due to the costs but mostly because I am always very cynical on what can easily turn out to be a "waffly course with good intentions but ultimately selling fried air". So I was very excited when he published the book Under Pressure (also available as Kindle edition).
In this book Gareth Lock describes how decisions can lead to incidents and applies research and techniques regarding decision making in other high risk industries (i.e. aviation) to diving. His ideas are very interesting and definitely useful however, I felt that the book was a bit too long. He spent a lot of time insisting and explaining the same concepts over and over again but at the same time just briefly touching upon how other industries (mostly aviation) solved the same problems. He does draw up comparisons but refers to the solutions with the use of acronyms and theories. He does however provide lengthy references to then go off and do the homework yourself.
I understand that each situation is different and there is no prepacked solution to the complexity of human behavior. Here is where I felt most that his lack of formal training as a psychologists/psychiatrist came through. Perhaps the actual course will cover more things in detail and this book should only be used along with the course. I struggled to finish it mostly due to its repetitiveness but I did find the examples and incidents that he reports on as very interesting and I do think that this book helps build a more open culture towards admitting errors and discussing incidents in a different way.