Dink Duncan and his two friends investigate the apparent kidnapping of famous mystery author Wallis Wallace. A is for author ... Dink writes to his favorite author, mystery writer Wallis Wallace, and invites him to visit Green Lawn. To Dink's amazement, Wallace says he'll come! But when the big day arrives, Wallace is nowhere to be found. The police think he just missed his plane, but Dink suspects foul play. It's up to Dink and his two best friends,...

When the umpire at the baseball game fundraiser is accused of stealing a collection of autographed baseballs, Dink, Josh, and Ruth Rose try to prove his innocence.

While learning detective skills at a sleep-away camp, Dink and his friends undercover a real mystery involving stolen paintings.