One False Note
One False Note is the second book in "The 39 Clues" series. It is written by Gordan Korman, and was published by Scholastic on December 2, 2008. Following the events of "The Maze of Bones", the protagonists Amy and Dan Cahill learn about Mozart and travel to Vienna, Austria to search for the second clue in the 39 Clues competition. "One False Note" entered the Children's Books New York Times Best Seller list at number one on December 21, 2008 and stayed on the list for children's chapter books for 12 weeks.
The 39 Clues
Amy and Dan's grandmother, Grace Cahill, changes her will shortly before her death. At her funeral, her lawyer, William McIntyre, tells Dan, Amy, and their other relatives, of a choice between one million dollars and a chance to participate in the Clue hunting a treacherous path to power. Amy and Dan enter the Clue hunt, competing against more experienced Clue hunters: the Holts, Alistair Oh, the Starlings, the Kabras, Jonah Wizard, and Irina Spasky. They find a hidden library and a clue. The mansion shortly burns down due to the Holts. Pursuing the clue hidden in Grace's library leads to the Franklin Institute. Then the Starlings get a serious injury made by the Holts, who had tried to kill Amy and Dan Cahill. There, Dan and Amy discover Benjamin Franklin has hidden a clue in Paris. After convincing their "au pair", Nellie, to chaperone their trip, Amy and Dan travel to Paris, where they follow a trail of ciphers and traps that lead them to the catacombs. Then, at an old church, they find the clue in a vial. The Kabras steal the vial, but Dan solves the puzzle and discovers the clue: "iron solute". There is also a secret piece of sheet music. Amy's internet searches lead to the probable location of the second Clue: Vienna, the home of Wolfgang Amadeus Mozart.