Selina ran into the library... quietly. She had learned her lesson from the first weeks of school and had lost house points for her unruly behavior. Respecting the library was important.

She began to wander aimlessly seeing nothing but books. It was hopeless, maybe nothing for Potions was even in the library. Then she saw it. It was so obviously out of place with the entire flow of the library. She went up to the shelf and extracted it and placed it in her bag. Luck was a beautiful thing.