there have been complaints by serious people about the work in this book, see https://statmodeling.stat.columbia.edu/2019/12/27/why-we-sleep-data-manipulation-

there have been complaints by serious people about the work in this book, see https://statmodeling.stat.columbia.edu/2019/12/27/why-we-sleep-data-manipulation-a-smoking-gun/ https://statmodeling.stat.columbia.edu/2019/12/27/why-we-sle... now, it's obvious to me that if I don't get 8 hours of sleep a night, my brain stops functioning properly and my entire life goes to shit very quickly. So I was happy to see a very popular book advocating sleeping well, and hopeful that if lots of people read it, they might have more respect for other people's sleep schedules. The critic, Alexey Guzey, seems to be a guy who needs less sleep than I do, and also a guy who is into life-hacking/self-improvement type stuff. There's definitely a type of person who thinks "sleep is for the weak". I think he probably does have a bias towards sleeping less. But I think the problems he points out about the book are pretty serious. In particular, it seems that claims around sleep and longevity and other health outcomes (e.g. injury rates, cancer) are often unreliable or based on misinterpreted studies, and one case involves eliding data that contradicts the result. Now, having myself experienced chronic sleep deprivation, and dealt with people who think they don't need to sleep but definitely do, I think the basic argument of the book is probably correct. But as the last line of that post quotes, "Good ideas do not need a lot of lies told about them to gain public acceptance".