You may be interested to read that the Why We Sleep guy committed research misconduct in the book. Guy is totally unrepentant about it.

https://statmodeling.stat.columbia.edu/2020/03/24/why-we-sle...

I'm not a huge fan of Dr Walker, and we actually compete with the company he is a "co-founder" of, but I think saying he committed research misconduct is going a bit far.

Misconduct is probably overstating it, and he wrote a popular book, which increased awareness of sleep health.