Thanks for the link. I read the book with the popular-science-ness of it in mind and was glad to have done so. It was produced right in the middle of the replication crisis... which isn't a particularly good look. I agree there are _a lot_ of ridiculous claims that are tenuous at best in the book. He also repeats himself a lot in a quite annoying way.

I still think the book has merit as an accessible way for people to learn more about sleep.