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 lead to the Florida Keys and finally to Mexico in this suspense-filled story that will thrill readers.

Once again Nancy Drew is involved in a mystery as she tries to locate an archaeologist who disappeared with the clues to a buried treasure.

Nancy Drew and her friends visit an old clipper ship in Boston harbor and help Captain Easterly uncover a mystery.

Nancy may not be into fashion, but this is one case she's ready to size up. Hot young designer Alicia Adams is opening a boutique in her hometown of River Heights. The opening is being celebrated with a one-day discount, and the press is all over the event. When the big day comes, tons of people show up, and when the crowd presses forward, the store window is smashed, and people are injured! Later, Alicia's most expensive dress is destroyed and her store is vandalized.

How about a seat at a mystery dinner on a riverboat? Yes, please! I jumped at the invitation to go along with Bess, George, and George's mom, who was hired to cater the dinner. It's all fun until there's an actual theft, and there's nothing like a good crime to stop a party. Since I've got the magnifying glass, it's up to me to catch "sticky fingers" before this dinner's sunk.

Eight-year-old Nancy Drew has her first case to crack! Can you help? Nancy and her two best friends, George and Bess, are so excited! They have been invited to Deirdre's sleepover party! There will be pizza, cake, and even a pajama fashion show. But the most exciting thing is that the party has a City Girls doll theme. All of the guests are bringing their dolls with them! But then Deirdre's City Girls doll -- Hollywood Heather -- goes missing. Is her sleepover ruined? Or is there a detective in the room who can make sense of this mystery?