Martin, Ann M., 1955- Kristy's great idea / [electronic resource] / Ann M. Martin.. — New York, N.Y. : : Scholastic,, c1986.. — 153 p. ; 20 cm. - Baby-sitters Club ; 01. - Martin, Ann M., 1955- Baby-sitters Club ; 01. . "An Apple paperback." ISBN: 0590433881 (pbk.) : $2.95 9780590433884 (pbk.) Subjects--Topical Terms: Babysitters--Fiction.Clubs--Fiction.Babysitters--Fiction.Clubs--Fiction. LC Class. No.: PZ7.M3567585 / Kr 1986 Dewey Class. No.: Fic