Aries snorted. He knew for a fact that Libra hadn't seen him. He was even fairly sure that the house elves hadn't caught a glimpse of the book in his possession, but you never could tell with those sneaky little buggers.
"I didn't take it," he insisted, glancing back over his shoulder to give Scorpius an exasperated look. "I'm expecting an apology when you find where you misplaced it, just so you know."
After he finished skimming over it, Aries had ever intention of dropping it into the potted plant farthest from his room. Maybe he could claim a ghoul had somehow gotten into the house.