Books were great during the boom as our understanding of the game was limited, but its so sophisticated these days I don't think a book will get you too far. The best way to learn is like everything else in life - fail forward. Get your 10,000 hours in if you want to be good at anything.
Two plus two is apparently the only site with people that still take Malcolm Gladwell seriously.
Most people who want to learn poker are young and have very short attention spans. Often they are suffering from what amounts to brain damage from their smartphone addictions. They are incapable of studying books and effectively absorbing their content.
Hence, there is little or no market for poker books.
