This book is about the importance of sleep: the functions it fulfils for us, how that changes throughout our life cycles, and the consequences of not getting enough. It has a wealth of citations, and most of it was unsurprising to me, suggesting it’s a reasonable synthesis of the current state of our knowledge.
However, and this is a really big but, I lost count of how many times Gregory proclaims something and then admits in the next sentence or a footnote that it was a ‘small study’ and hadn’t been replicated in other studies, especially when she says it hasn’t been replicated in larger studies. The fact that she made it sound like these things were facts, when actually it was that shaky, gave me pause about more or less everything she said.
You can’t make big claims from small, underpowered studies. That’s just not how it works. They can be a testing ground, a starting point, but there’s no way you should be presenting them as fact in a pop-science book where people might actually think these are tried and tested facts, even if you explain the study is small. People just don’t grasp the significance of that (or rather, the fact that it’s probably not significant!).
I’ve also definitely had more engaging pop-science reads lately; Sue Armstrong comes to mind. Sleep can be a fascinating topic, but I found myself nodding off over Nodding Off.