It would not happen in real life, these posts with ridiculously long periods of time to find something are just doing the equivalent of "Only 10% of people can solve this basic puzzle!"
Why are the books in reverse order? To make the puzzle slightly harder. It's clickbait/attention seeking posting.
The book was a romance that started from "and they lived haply ever after" went through a period were they became less and into each other, until they had a last kiss, then later met for the last time and ultimately ended up so far apart from each other that it was as if they had never met.