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 go to China to find the next clue. They split up following an argument but reunite at Mount Everest, where they find a Janus vial left by British mountaineer George Mallory. They battle Eisenhower Holt and Ian Kabra over a partial serum. Ian falls, and Amy sacrifices the serum to save him. When Dan thinks they have lost the clue, Amy shows him the poem on a silk fabric they found in Beijing and tells him the next clue is raw silkworm secretion. They realize that a formula on the silk means that four partial serums add up to one master serum. Dan shows Amy the locket he found at a Shaolin temple, which contains an inscription of the name of the pirate Anne Bonnie. They decide their next destination is the Caribbean.