The Clue of the Whistling Bagpipes, Nancy Drew Mystery Stories, number 41 in the series. Author: Carolyn Keene. 177 pages. Hardcover. Publisher: Grosset & Dunlap, no 9541, published in 1964. ISBN 0-448-09541-6. Book is in excellent condition with tight binding and spine and unmarked pages, and very light wear to the cover edges. From the book: "... Warnings not to go to Scotland can't stop Nancy Drew from setting out on a thrill-packed mystery adventure. Undaunted by the vicious threats, the young detective - with her father and her two close friends - goes to visit her great-grandmother at an imposing estate in the Scottish Highlands, and to solve the mystery of a missing family heirloom..."