Doing well in sports is important to any boy.  Usually it comes from hard work.  But for Chuck O'Neil, making a basket was easy as becoming class president or winning marbles from the other members of the school basketball team.  At times, even to his friends Mickey and Steve, it seemed that Chuck preferred shooting marbles to playing basketball.  Indeed, nothing really bothered Chuck until his marbles began to disappear. Then he looked at everyone with suspicion.  Enjoy reading the old classic by Matt Christopher and see how Chuck solves the mystery.