Suggest some nonfiction/text books/resources(YT/web) from your subject of expertise

Doesnt have to be books , any resources like youtube/online/courses

Just want to see some unique subjects or just looking out for unpopular but needed stuff you read in your area of expertise/interest.

Could be anything from technical to basic.

I would like you to check Joseph Everett - WIL - YouTube, Louis Rossmann - YouTube and Doug Casey’s Take - YouTube.

Already am a sub of joseph, louiss-watched few of his. Doug is new.