Black Mail?

"How exactly are we going to do it, with the wards and all?"
"That's simple. We'll fly up to the Gryffindor tower and land on the girls balcony."
"Why are we even doing this in the first place?"
"Because I want a new broom stick! Go get your broom and meet me at the Slytherin balcony."

Hermione has become a new celebrity when she published her first book to her series "Endless Prejudice." She left a major cliffhanger, which has a Ravenclaw desperate to read the next book. Hermione brought her computer to write the next book, but it never leaves her side. The Ravenclaw enlists the help of Draco Malfoy, Blaise Zabini, and Pansy Parkinson to help her steal it, blackmailing them in the process.