[interleave]

The flood began years ago with low-priced ghostwriting services.

I'd venture to say that most of the non-fiction ebooks, and especially the best-sellers for Kindle, are published by multi-nom-de-plume "grindset" publishers.

In 2017, a 10,000-word "booklet" on any non-fiction topic cost $200. That usually took about ten days from order to completion. The content was pretty much the same you'd now get via LLMs.

[Ekaros]

Sometimes I browse books for Kindle and sort by cheapest. And see some entire multi-book series for a few dollars...

Either you get volume, or you had to produce those very cheaply to it make any sense at all.