Lily Luna Potter and the Sorrowful Spectre

Lily Luna Potter has been waiting her whole life to go to Hogwarts School of Witchcraft and Wizardry, now she would finally be getting her chance to attend, alongside her cousins and best friends, Hugo Granger-Weasley and Daisy Dursley. Her older brothers think they know everything there is to know about Hogwarts, but there's places, and people, even they haven't yet discovered.