Mystery at Raider Stadium — Jerry B. Jenkins

“Let's use the buddy system.” Daniel goes to a big league ball game with his church team and their sponsor. Because of the size of the team, the sponsor sets up a “buddy system” to keep track of everyone. Daniel's buddy is a younger boy called Chad. Chad lives with his mother and three-year-old sister. His father left them shortly after his little sister was born. On a trip to the concession stand, Daniel sees a man kidnapping Chad. This, of course, sends Daniel off on a wild adventure. Is he able to rescue Chad? There's a lot of good reading on the way to an answer.