Sorry, I have no idea which author wrote 'night music novel'. It could be an indie author or a relatively unknown one. Maybe it's a new release and not widely known yet.
I'm not sure specifically as 'night music novel' could be many things. It might be a novel that has a lot to do with music played at night, perhaps with a story set in a nightclub or concert hall at night.
One possible scenario in a Pokemon fanfic with 'A Little Night Music' could be a Pokemon concert at night. Trainers might gather their musical Pokemon, like Jigglypuff, and have them perform in a beautiful outdoor setting. The music could attract other Pokemon, creating a magical and harmonious scene.
It's a story that often involves elements of romance, music, and perhaps some drama set in a particular setting. But the specifics can vary depending on the interpretation.