Harry Potter and the Sorcerer's Stone
by J.K. Rowling
In book one, Percy is the oldest of the Weasley children still attending Hogwarts. More stuck up than Fred and George and more established at Hogwarts than Ron, he enjoys being a Prefect and rubs his status in his brothers' faces a bit. Percy seems more rule-abiding and brown-nosing than his brothers do, but he's also proud of them when they do well.