One False Note

The book follows the Cahill siblings, Amy and Dan, as they travel to Vienna in search of the second clue in the 39 Clues competition. They face numerous challenges and dangers as they try to outsmart their ruthless relatives and uncover the secrets of their family's past. The highly-anticipated Book 2 of the #1 bestselling The 39 Clues series. From the back cover: The race is on to find 39 Clues that safeguard a great power, and fourteen-year-old Amy Cahill and her younger brother, Dan, are shocked to find themselves in the lead. The search seems to be taking them to Vienna, and they hold a coded piece of Mozart's sheet music that's key to finding the next Clue. But tailed by a pack of power-hungry relatives, Amy and Dan can't see if they are sailing toward victory - or straight into a deadly trap.