World's Greatest Sleuth!Audiobook CD - 2011
A sleuthing contest brings Big Red and Old Red to Chicago during the World's Columbian Exposition, but when the man behind the competition is found dead, the only ones who believe that it's murder are Old Red, his brother, and an old friend who could hold the key to the mystery.
Publisher: [Old Saybrook, Conn.] : Tantor Audio, p2011.
Characteristics: 8 sound discs (9 hr., 30 min.) : digital ; 4 3/4 in.