The eighteen-year-old girl detective must find a man who has been missing for years in order to locate the other half of a treasure map.

Prompted by the concerns of a young child, Nancy investigates a small studio on the Chatham estate. She discovers that there is a connection between the mysterious occurrences at Ship Cottage and her search for a treasure island. With only half of a map, Nancy sets out to find the man who possess the rest of the map that will pinpoint the location of buried treasure. Constantly beset by danger and intrigue, Nancy courageously outwits her enemies and solves one of the most challenging cases in her career as a teenage investigator.

This eighteenth book in the Nancy Drew series was originally published in 1941.

Nancy becomes involved in a double mystery concerning a haunted bridge and jewel thieves.

A friend of Carson Drew’s has been arrested and charged with sending a truck loaded with explosive oranges into the Space Center complex at Cape Kennedy. Knowing that Mr. Billington could not possibly be guilt of sabotage, Nancy and her father rush to the defense of the accused man. During the Drews’ investigation Nancy become suspicious of an old spooky mansion that houses fierce African wild animals on its extensive grounds. Soon, she discovers that something besides the training of wild animals is going on at the mysterious estate. Many dangerous moments await Nancy before she proves Mr. Billington’s innocence and thwarts the plans of treacherous subversives bent on undermining the U.S. space program.

Nancy Drew and her friends investigate a murder case, that involves some members of the university basketball team.

Aunt Eloise Drew invited Nancy and her friends to Mirror Bay Bide-a-Wee cabin near Cooperstown, New York, for a visit and a chance to solve the mystery of the woman who glides across the water. Upon their arrival, Nancy becomes mixed up in a vacation hoax and is nearly arrested for fraud. On the wooded mountain near the cabin further exciting events await Nancy and the other girls. In the deep forest, a weird luminescent green sorcerer appears who threatens to cast an evil spell on anyone investigating his strange activities. In a dangerous twist of circumstances Nancy finds that solving one mystery helps to solve another. What happens when the young detective and her friends uncover a cleverly concealed criminal operation?

When a neighbor asks Nancy Drew to accompany her to an old uninhabited mansion, a new mystery opens ups, and danger lurks on the second floor. Nancy finds a witch tree symbol that leads her to Pennsylvania Dutch country in pursuit of a cunning and ruthless thief. The friendly welcome the young detective and her friends receive from the Amish people soon changes to hostility when it is rumored that Nancy is a witch! Superstition helps her adversary in his attempt to get her off his trail, but Nancy does not give up. Persistently she uncovers one clue after another. Nancy’s intelligence and sleuthing ability finally lead to the fascinating solution of this puzzling case.