TY - BOOK AU - Korman,Gordon TI - One false note T2 - 39 clues SN - 9780545060424 (trade) U1 - [Fic] 22 PY - 2008/// CY - New York PB - Scholastic KW - Mozart, Wolfgang Amadeus, KW - Family KW - History KW - Fiction KW - Cryptography KW - Genealogy KW - Mystery and detective stories KW - sears KW - Mystery fiction KW - Brothers and sisters KW - Orphans KW - Ciphers KW - Adventure and adventurers KW - Vienna (Austria) KW - Code and cipher stories KW - lcsh KW - gsafd N1 - Includes cards; Booklist, February 2009; Horn Book, October 2009; Voice of Youth Advocates (V.O.Y.A.), April 2009; Resource Links, April 2009; 4.6; 3-6; 680L; Lexile; U; Fountas N2 - Amy and Dan Cahill are in the lead to find thirty-nine clues that safeguard a great power, and are in possession of a coded sheet of Mozart's music that will help them find the next clue while their relatives follow in close pursuit. Includes cards ER -