Take a bow, Dr Knife Steel: inspirational, blessed and down-to-earth. My comparable obsession with austenitic steels has now gone fully virtual thanks to materials informatics.
https://www.amazon.com/Materials-Selection-Mechanical-Design...
Aside from the credentialing problem, you will get an amazing return on investment - just view it as buying hours of your own time _not_ wasted on @$@#$# youtube videos.
If you're an over-achiever, you might negotiate a lower price on the understanding that the curriculum he develops (with your feedback/experience) for you stays with him and he markets it on the forums he has credibility in.