The Double Jinx Mystery, Nancy Drew Mystery Stories, number 50 in the series. Author: Carolyn Keene. Hardcover, 180 pages. Publisher: Grosset & Dunlap, no 9550, published in 1973. Library of Congress Catalog Card Number 72-90826, ISBN 0-448-09550-5 Book is in very good condition. Covers are in excellent condition. Inner pages are in very good condition with a few light smudges on the margins of some pages. From the book: "A bird of ill omen is mysteriously left on the Drews' front lawn. Did the person who put it there do so with the intent of jinxing Nancy and her father?..."