One false note

Amy and Dan Cahill are hot on the trail of one of 39 Clues hidden around the world. When there's a Clue on the line, anything can happen.

Main Author: Korman, Gordon.
Other Authors: Pittu, David.
Format: Downloadable Audio
Published: New York City : Scholastic Audio, 2008.
Physical Description: 1 sound file (4 hr., 8 min., 17 sec.)
Series: 39 clues ; 02
Online Access: Click here to access title