Nancy becomes involved in another mystery when she accepts an invitation from Mrs. Chantrey, a client of Mr. Drew, to vacation at her cottage in a picturesque seaside town. Carson Drew has promised to join his daughter, but fails to arrive. The alarming disappearance of Mr. Drew and the odd circumstances surrounding his rescue are only the start of a series of highly dangerous adventures for Nancy and her friends Bess and George. Mrs. Chantrey's story about a nearby Cliffside cave reputedly inhabited by a ghost intrigues Nancy and she decides to investigate. Several frightened townspeople...

When Mrs. Putney seeks Nancy Drew's help in recovering her stolen jewelry, the search for the thieves takes the teen-age detective and her friends Bess and George to the colorful French Quarter of New Orleans. But the quest is hampered by the strange behavior of Mrs. Putney, and two young women who are being victimized by so-called spirits. How can Nancy fight these unseen perpetrators of a cruel hoax? And how can she help the gullible victims when the spirits warn them not to have anything to do with Nancy?

Adventure abounds on the Bonny Scot in Boston Harbor as Nancy Drew helps Captain Easterly uncover the mystery of his ghostly visitors. From the moment the clever young detective and her friends, Bess and George, take up residence on the old clipper ship they are confronted with fire, theft, and other dangerous situations. Nancy faces an additional challenge: to find a clue to the clipper's missing figurehead. If she is successful, it will help her lawyer father to trace the history of the Bonny Scot and establish a clear title to the ship for Captain Easterly. But strangely there are no...

Terry Scott, a young archaeology professor, seeks Nancy's help in unearthing a secret of antiquity which can only be unlocked by three black keys. While on an archaeological expedition in Mexico, Terry and Dr. Joshua Pitt came across a clue to buried treasure. The clue was a cipher carved on a stone tablet. Before the professor had time to translate the cipher, the tablet disappeared - along with Dr. Pitt Terry tells Nancy of his suspicions of the Tinos, a Mexican couple posing as scientists who vanished the same night as Dr. Pitt. Nancy and her friends follow a tangled trail of clues that...

When Nancy learns that the Drews' housekeeper has been duped by an elegantly dressed woman into buying a stolen fur piece, the young detective starts a search for the clever swindler. To Nancy's astonishment, she discovers that the woman is using the name Nancy Drew. The dishonest acts of the impostor point the finger of suspicion at Nancy herself and result in her being questioned by the police. Join Nancy in this thrilling mystery as she solves the mystery and clears her name.

A masquerade party at the Hendricks' mansion quickly turns into a mystery when Nancy and her favorite date, Ned Nickerson, spy a stranger about to climb the rose trellis to the second story. Who is this enigmatic man in the black cloak and the exotic woman in the Javanese costume? Are they members of a gang of wily thieves who sneak into partied given by wealthy people and steal jewels and art treasures? And why is the owner of the black velvet hooded mask that Ned finds in the Hendricks' garden so desperate to get it back? To find the answers Nancy and her friend George devise a daring plan....

Nancy meets Helene and Henri Fontaine, refugees from Centorvia who run a dancing school in River Heights. Strange circumstances have brought the brother and sister to the United States. When they receive an anonymous note threatening their lives, Nancy offers her help, but she encounters nothing but puzzles. Are the Fontaines involved with the Centrovian underground? Have they been threatened by their own countrymen? When the Fontaines disappear, Nancy and her friends pursue the trail, even though danger lurks around every corner.

Mrs. Strook requests Nancy's help finding an old stagecoach she believes her uncle hid in her hometown of Francisville. Mrs. Strook believes the stagecoach houses a clue that will be valuable for the town Can Nancy help her find the missing stagecoach?

Nancy receives an urgent call from her Aunt Eloise in New York, requesting her help in solving a mystery. Her neighbor's granddaughter, Chi Che Soong, has gone missing Nancy and her friends fly to New York to help track down the missing girl.

When Nancy Drew receives a valuable moonstone as a gift from an unknown person, she is amazed and puzzled. But it is only the first of several startling events in this complex mystery that challenge the ingenuity of the pretty sleuth.

Why are the Bowens - a missionary couple who recently returned to the United States - having so much trouble finding their missing seventeen-year-old granddaughter, Joanie Horton? Nancy and her friends travel to Deep River, the town where the young Jonie lived. From the motel where Nancy and her friends stay, they can see an intriguing castlelike structure...