I think there’s also an element of spoiler-avoidance. I don’t know the plot of the story exactly, but I’ve seen the anime and in the past have read the Wikipedia page for the book, so there’s a limit to how much I can speculate on future events. Perhaps books without anime adaptations would naturally have a little more discussion as a result.
Raionus would probably add it if it were picked though it’s not a given, obviously, but at worst we could nominate it to be added and then all vote for it on Patreon
@Elenakiyomi I think 時をかける少女 proper is about 120 pages of text, for comparison.