Gotham Academy. Volume 2. Calamity

At the beginning of the term, Olive Silverlock returned to Gotham Academy a shadow of her former self. But thanks to her new friendships and their Detective Club sluething, Olive was finally starting to feel whole again. But now, Olive is seeing ghosts. A spectral, robed figure is haunting the Academy, and haunting Olive in particular, appearing to her and giving sinister instructions. Could this spirit be the key to unlocking the secrets of her family's dark past? Or is Olive simply losing her grip on reality?