Mystery

The main idea of the Nancy Drew series is that of a young, intelligent, and courageous amateur detective who solves mysteries with the help of her friends. Nancy's adventures involve unraveling complex cases, often with supernatural elements or a touch of mystery, and she is portrayed as a role model for young readers due to her independence and problem-solving skills. 

cloud of shame. But the letter describes a young African American woman named Siobhan Washington. An injustice that happened decades ago. A mystery enfolding the letter writer. And the fortune that awaits the person who solves the puzzle. Grandma tried and failed. But now Candice has another chance. So with the help of Brandon Jones, the quiet boy across the street, she begins to decipher the clues in the letter.

Discovering her ability to see ghosts when a cruel act ends her father's life and forces her to move in with relatives in 1920s Pittsburgh, young Ophelia forges a helpful bond with a spirit whose own life ended suddenly and unjustly.

"When Colin finds a shoebox full of letters hidden in a stranger's attic, he knows he's supposed to throw them away. That's his summer job, getting rid of junk. But Colin wants to rescue the letters--and find out what really happened to best friends Rosemary and Toby way back in the 1970s. Meanwhile, across town, Nevaeh also finds a mysterious letter. But this one reads like a confession to a crime. And Nevaeh knows her father, the 'Junk King,' expects her to join the rest of the family in blaming a single suspect: his business rival, Colin's mom."

Eleven-year-old Millie and five other girls, snowed in at Amelia Earhart Birthplace Museum in Atchison, Kansas, are on a scavenger hunt when the lights go out and Amelia's aviator goggles go missing.

A boy goes to live with his magician uncle in a mansion that has a clock hidden in the walls which is ticking off the minutes until doomsday.

Twelve-year-old Steve is investigating a diamond heist but the case suddenly changes when the author of the Bailey Brothers detective novels writes him a letter to say that he fears for his life.

When local girl Loren includes Mara in a traditional Blackfeet Giveaway to honor Loren’s missing sister, Mara thinks she’ll finally make some friends on the Blackfeet reservation.

Instead, a girl from the Giveaway, Samantha White Tail, is found murdered.

Because the four members of the Giveaway group were the last to see Samantha alive, each becomes a person of interest in the investigation. And all of them—Mara, Loren, Brody, and Eli—have a complicated history with Samantha.

When thirteen high-value pieces of art are stolen from a secret museum, Calder, Petra, and Tommy are grouped with two new companions to solve puzzles that are complicated by the clever Mrs. Sharpe.

During the summer before ninth grade, intrepid Gilda Joyce invites herself to the San Francisco mansion of distant cousin Lester Splinter and his thirteen-year-old daughter, where she uses her purported psychic abilities and detective skills to solve the mystery of the mansion's boarded-up tower.