Martin, Ann M., 1955- Karen's mystery. [book] - New York, N.Y. ; Toronto, Ont. : Scholastic ; 1991. - 130 p. ; 19 cm. - The Baby-sitters little sister super special ; #3. . - Baby-sitters little sister ; #3 . ISBN: 0590448277. 0590448277 (pbk.) : $2.95 Subjects--Topical Terms: Mystery and detective stories. Dewey Class. No.: JF MAR