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.
Peter Lerangis
In 2007, Scholastic announced the launch of a new historical mystery series called "The 39 Clues", intended to become a franchise. Lerangis wrote the third book in the series, "The Sword Thief", published in March 2009. On March 3, 2009, Scholastic announced that Lerangis would write the seventh book in the series, "The Viper's Nest".