Nancy and her friends find they have to overcome people's superstitions and fears in solving the case of a "jinxed" and threatened bird farm.

Mr. Drew has Nancy help him track down a missing heiress and Nancy, Bess and George stumble upon a mysterious moss-covered mansion. They later hear that someone was murdered near the mansion and they repeatedly hear strange noises coming from inside the mansion.

Rehearsing for a musical and writing songs prove to be frightening experiences for the two Dana sisters, as there are ghosts in the theater, or are there?

The Dana girls unravel a mystery involving a marble tiger from India.

While spending spring vacation at an ocean resort, the Dana girls encounter the mystery of the nocturnal surfer who disappears into the sea.

The Dana girls and their friends try to locate a missing sea captain last seen on Chincoteague Island off the Virginia Coast.

The Dana girls turn their attention to the thefts, kidnapping, and other mysterious events which surround a teenage pageant.