"Folding Ideas" does amazing work on YouTube around exposing grifters in well structured, long form explanations of their grifts.
One of their videos looked into a group of growth hustler type folks, a pair of twins. Part of their scam was automating the process of creating fake books like this from start to finish to sell them online for passive income.
Highly recommend anything this channel creates. Worth your time to have a focused sit to watch the journey unfold (especially if interested in the main subject of this post).