He listened for the tell-tale footfalls, or Libra's giggle that would indicate the missing book was part of a joke. His lips pursed in annoyance before he roamed down to his sister's room, peeking in to see if she was there, or if the book was - but he doubted Libra was behind it.
Not with this being Aries' first year.
Scorpius sighed before he turned down the hall toward Aries' room, rapping on the door frame, he let himself in. "If you've got my book, you've got all of ten seconds to toss it out before I tell dad you've been going through my things."