Nancy tackles two interesting mysteries for Cecily, a friend she just met. One involves Cecily's fianc and the other a family treasure. When Nancy Drew sets out to solve the mystery of a hidden family treasure for her friend Cecily Curtis at Misty Lake, she encounters strange aparitions and a haunted house.

After a near disaster, when the boat Nancy and her two friends were in gets caught in a horrible storm, a mystery unravels in a bungalow that they have found.

Teenage detective Nancy Drew uses her courage and powers of deduction to solve the mysterious happenings in an old stone mansion. She recieved a phone call from her friend, Helen Corning. Helen says they were robbed, heard thumps in the night, and have heard strange music when no one has turned on the radio Helen begs Nancy to come to Twin Elms and try to solve the mystery.

Nancy Drew and her friends go on a ghost hunting expedition and become involved with a gang of thieves who concentrate their activities on collectors of valuable shells.

Nancy Drew travels to Peru to solve a mystery involving a long-lost treasure and a crossword clue carved into an ancient wooden plaque.

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

Nancy Drew tries to find a clue to the strange tapping sounds in the house of a retired actress.

The young detective and her friends probe the mysterious movements of puppets on the Van Pelt estate

Nancy and her friends become involved in a search for lost treasure.

Nancy uses a lost diary to exonerate an innocent prisoner.