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.
Beyond the Grave
Beyond the Grave is the fourth book in "The 39 Clues" series first published in June 2, 2009 and written by Jude Watson. Thematically the novel uses Biblical knowledge, prophecy, and spiritual topics to explore the afterlife. Amy and Dan Cahill, the protagonists, travel to Egypt because of a clue they discovered in "The Sword Thief". The symbols in the middle of the book translate "Alistair was there the night they died."