Here's a thought:
Americans spend 20 billion dollars weight-loss products, 108 million americans are on a diet. Yet 69% of americans are overweight. Most diet books are scams, only a few of them are complete truth as they tend to not sell as many copies, yet losing weight and building muscle is as easy as ABC in theory. People just don't put in the effort.

This got me thinking: Which books are the Starting Strength of business? Which book lays out a path to riches with no bullshit claims to sell copies? The only reason not everyone who reads these books is a millionaire yet is because "they are not doing the program" (famous quote of Starting Strength, explaining you didn't get the results promised because you cut corners or tweaked the program because the author's directions were too hard)

pic slightly related