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.
Mystery (novel)
Together with "Koko" and "The Throat", "Mystery" forms a series of novels often referred to as the "Blue Rose Trilogy." Though the novels feature similar themes and many of the same characters, they do not take place in strict continuity with each other; for instance, the main character of "Mystery", Tom Pasmore, goes on to appear in "The Throat" and two other novels, but a major element of Tom's backstory- a childhood accident that left him hospitalized and incapacitated for several months- is transplanted to the main character of those novels, a writer and Vietnam veteran named Tim Underhill. A similar accident actually happened to the author himself as a child.