A Ghost and a Notebook (An Amphibia AU Fanfiction)

This is an AU of Season 3 that I wrote before Season 3 came out. After her death, Marcy finds a notebook in the castle and begins to write down her thoughts, but little does she know, a lot more adventure than just journal entries awaits. Spoilers! I don't own the show, Amphibia, but I do own the story and the art for...