You claim that someone who does the job is valuable, nobody disagrees.
He asks; where can I find good explanations of concepts that I've found useful throughout my career and I want to pass on to my juniors?
See how this justifies a downvote?
And I claimed nothing about “someone who does the job is valuable”. My claim was that there are, generally speaking, three types of workers and the vast majority of workers are unlike OP, in the sense that they probably don’t care in the slightest because they are 9-5 workers or someone who would rather learn themselves.
Maybe with that as a baseline understanding the next interpretation of his question becomes: where can I find others in a similar predicament so that we can collaborate on building the book (as I gain experience coaching these juniors and need support network when I am flummoxed)?