While vacationing at a lake, Nancy, Bess, and George have their eyes on first prize in the annual sand castle contest. They use special colored sand and carefully build the castle to look like the ones they researched at the library. If the girls win, they’ll get their picture in the local paper and all the ice cream they can eat. But before judging begins, someone wrecks the girls’ castle and writes a mean message in the sand. Nancy and her friends will have to dig deep to get back into the contest before it’s too late!

Blue bells will be singing horses! This strange message, attached to the leg of a wounded homing pigeon, involves Nancy Drew in a dangerous mission. Somewhere an elderly woman is being held prisoner in a mansion, and Nancy is determined to find and free her. Meanwhile, the young detective’s close friend, Helen, begs her to solve a second mystery. Helen’s grandparents, the Cornings, are frightened by a sinister wheel of blue fire that appears after dark in the woods outside their home at lonely Sylvan Lake. When Nancy discovers the significance of the eerie signal, she also learns that her two mysteries are connected.

When Nancy receives a letter informing her she’s heir to a fortune, she decides to track down the sender, as well as the other Nancy Drew.

Read the original Nancy Drew mystery! The Secret of the Old Clock is the mystery that began it all for America's favorite teenaged slueth. The accidental rescue of a little girl who lives with her two great-aunts leads to an adventurous search for a missing will.

Nancy takes her best friends, George and Bess, to the new spa in town. However, weird things keep happening that may drive business away, and Nancy is determined to find out who's responsible.

Nancy Drew returns to the Hamptons to investigate the disappearance of a local artist's paintings, and to continue her romance with Sasha, the Russian ballet star.

Nancy finds herself in danger when she tries to solve the mystery of the old inn, believed to be jinxed.