I'm about 25 years looking for a book I remember getting out of the library as a teenager. I've even gone back to the library to see if there are any records of books borrowed in the late 90s (there weren't). None of the LLMs have helped and neither have a number of subreddits. So I occasionally use it as motivation to read obscure stuff from about the right era. However, my memory is confused and has definitely conflated a number of different titles (I found a couple of scenes in an Arthur C Clarke anthology, but not the main plot thread).