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.
Connie Blair
Connie Blair is the central character in a series of 12 mystery novels for adolescent girls written by Betty Cavanna under the pseudonym Betsy Allen. Cavanna wrote volumes 1 through 11. The author of volume 12 remains unknown. The series was published by Grosset & Dunlap between 1948 and 1958. Book titles were distinguished with a color in the title such as "The Clue in Blue" and "The Riddle in Red".