Earlier this year Amazon added a “Recaps” feature that
uses AI to summarize book series up to a certain point so that readers can more easily pick up where they left off after a break. I can see that being useful for series that I read as they come out, often with a year or two gap between books.
For those against AI it is interesting that Amazon
states to KDP self-publishers, “Can I opt in or out of Recaps for my books? The Recaps feature is always on to provide readers with a consistent experience across series they read, so there is no option to enroll or unenroll.”