Thanks frereubu. Sorry, I posted it because the author kadavy wrote the book "design for hackers" and it was big on HN a while ago. I was going to add the "design for hackers author" to the title, but I didn't want to editorialize it.

I thought this community would like it and can relate to it, but I understand if it goes against guidelines.

is this good enough to post or unflag, or is linking directly to Amazon not a good idea. Thank you!

Thanks for the explanation @frereubu. I was just typing up a summary. It's in the comments now. Sorry for the strange delay.