It was such a relief to sink into the cushions that it took a moment for Harry's words to register.
"She what? Ron's possessed?"
Pillows fell unheeded to the floor as Hermione sat up straight and accio'd her notes. "That would explain so much - oh God, he's been fighting it for weeks and we never noticed, I can't believe I was so blind - "
There were books on magical possession, but it was so rare that she'd devoted most of her time to spells or diseases. Now she frantically paged through her notebooks in search of the few things she'd written down.