Napoleon Hill, the well-known crook? https://gizmodo.com/the-untold-story-of-napoleon-hill-the-gr...

Not to say that some of his work is not useful though.

That's fair. I don't even know whether they are authentic NP notes (never read his books), but the channel is the only thing that helped me to be very close (a few days/a couple of weeks away) to complete a non-trivial learning project out of school -- first time ever in my life, how weird that sounds. I guess as long as it works it's fine.