I am currently in a limbo waiting for more pleasure reading to be published by my favorite authors, so have been trying to wade through the fake reviews to find some filler stuff. I'm currently into post-apocalypse and military scifi, and there are just a billion mostly self-published authors of this stuff, often with ads for each of their books on Amazon that look like the ads for blockbuster movies.
The writing is generally mediocre, but readable as something to pass the time. I can generally live with the usual self-published stuff like grammar mistakes and missing words and the like on every 10th page or so. What has been bothering me lately is something I'm seeing more and more of, and that I think might be a sign of AI writing, is, as an example, constantly using a character's full name and title. I'm currently reading the "Rise of the Republic" series by James Rosone. I swear that in every third paragraph, he restates a character's full title, as in, "Captain Miles Hunt was called to the bridge". "Captain Miles Hunt took his seat on the Command Deck".
It goes on and on with that kind of stuff for multiple characters, rather than introducing them with full name and title, then going to "CAPT Hunt" or "Hunt" or "Miles". It's extremely annoying, and my guess is that it might be due to AI writing, or AI assistance in writing, plus poor editing, because some of these authors seem to write a book a month. Which seems difficult to do on their own, versus having an AI write it, then spending some time doing quick edits to make it seem less-AI. I have on occasion asked various AIs to write science fiction short stories, and that too often repeated "full name and title" thing was something that was done numerous times.
Anyways, if it is AI writing, AIs still have a ways to go to be good storytellers, versus "Here's the story you asked for" writers.