انتقام دلقک (داستان‌های معمایی نانسی درو، شماره ۸۴)

The Joker's Revenge - Nancy Drew Mystery 084Undercover as store employees to track a malicious practical joker in an exclusive department store, Nancy, Bess, and George are determined to discover who is wreaking havoc upon the store and its staff.** Some joker is causing trouble for Danner & Bishop, Chicago's most exclusive department store, but no one's laughing. Then Nancy and friends go undercover as store employees to catch the culprit—and find themselves in serious trouble. Nancy's And Her Pals Go Undercover In Chicago's Most Exclusive Department Store.