Well, without more context, it's hard to say precisely. Maybe it's a coming - of - age story where the 'weird girl' is an outcast at first but then finds her place. It could deal with themes like acceptance, self - discovery, and the challenges of being different. For example, she might have some special abilities or interests that others don't understand, and the novel could explore how she copes with that.
I'm not sure specifically as there could be many novels that might be referred to as 'that weird girl novel'. It could be about a girl who has strange habits, an unusual appearance, or a very different way of thinking compared to the society she lives in.
Since we don't know which exact 'that weird girl novel' is meant, it could be a horror story where the girl has some spooky or inexplicable qualities. She might be a character that brings an eerie atmosphere to the story. Or it could be a romantic novel where the 'weird girl' attracts the attention of someone in an unexpected way, and their relationship unfolds in a unique and interesting manner.