Couple of other anecdotal data points:

1. Guy I know who is an exec coach says that a chatbot can do a lot of what he does. 2. I am absolutely seeing lots of people asking ChatGPT a question and treating its answer as the truth.

So I can well believe that, in an age where you can get a quick answer to anything for free, that the market for books is collapsing.

Having said that, I also suspect that many of these self-help books are effectively a blog post stretched out over hundreds of pages, so maybe a decline in their sales is no bad thing.