Keen, Carolyn The clue of the black keys/ Carolyn Keen - New York : Grosset & Dunlap, c1996 - 174p.: ill. ; 19cm. - Mystery stories 28 . ISBN: 0448095289 Subjects--Topical Terms: Mystery and detective storiesDrew, Nancy (Fictitious character)--Juvenile fiction Dewey Class. No.: F KEE