Bones and the Football Mystery (Bones) (Book:9)

Detective Jeffrey Bones is at a football game with Grandpa and his friend Sally. With Grandpa's lucky shirt and hat, their favorite team is sure to win. But when Grandpa throws his hat in the air after a touchdown, it disappears, and it could be anywhere in the stadium! Can Bones use his detective bag and his sharp mind to solve this mystery of the missing hat?