Ooof, Matthew Walker’s “Why We Sleep” Is Riddled with Scientific and Factual Errors
https://guzey.com/books/why-we-sleep/
Seems like his PhD credentials are hard to verify, too, hmmm....
Well, that's one less book on my already-too-long reading list :)

Matthew Walker's "Why We Sleep" Is Riddled with Scientific and Factual Errors - Alexey Guzey
Note: I link to a bunch of paywalled studies in this essay. Please do not use sci-hub to access them for free and do not use this trick (a) to easily redirect papers to sci-hub. For the clearest example of deliberate data manipulation, see how Walker edits out the data that contradicts his argument from the graph. Also see UC Berkeley’s official response regarding this essay – all problems with the book I discovered are “minor”. Also see Walker’s post. Note: the …