While visiting her Aunt Clare at the old family home, she discovers an eerily-haunted dollhouse in the attic—an exact replica of the family home. Whenever she sees it, the dolls, representing her relatives, have moved. Her aunt won't listen to Amy's claims that the dolls are trying to tell her something. This leads Amy to research old news reports where she discovers a family secret—the murder of her grandparents. The two sisters unravel the mystery. Amy grows to accept her sister and to understand that Louann is more capable than she had first thought.

    But when the boys arrive for an overnight visit at Terror Castle -- home of a deceased horror-movie actor -- they soon find out how the place got its name!

    To the surprise of many, the Topham family will inherit wealthy Josiah Crowley's fortune, instead of deserving relatives and friends who were promised inheritances. Nancy determines that a clue to a second will might be found in an old clock Mr. Crowley had owned and she seeks to find the timepiece. Her search not only tests her keen mind, but also leads her into a thrilling adventure.

    Follow the children as they flee down a river, are chased by ferocious dogs, locked up in an old manor, get lost at sea, expose a spy, and more!

    A devoted admirer of the great detective, he had learned his craft by listening at the feet of Holmes himself. The Mystery of the Missing Twins was one of the strangest cases in Basil's career. He had only a few crumbs of clues with which to find solutions to such baffling questions as: Who had masterminded the plot? Where were the twins, Angela and Agatha, being kept?

    Try to crack the cases along with him--the answer to all the mysteries are found in the back!

    Marden reports that some of her valuables have gone missing, the twins investigate.

    Their goal is to stay together, and in the process they find a grandfather.

    Mandie's move into a neighbor family's home, when her mother remarries, does not soften her grief. Her only comfort is the promise from her father's faithful Cherokee friend, Uncle Ned, to watch out for her and be a friend. Will Mandie be able to escape her new and nearly intolerable home situation? Will she find her long-lost family? Will the mysterious key unlock the door to the secret tunnel and her own family's history?For children 8-13, mystery adventures set in the North Carolina backwoods at the turn of the century.

    This first one, "The Tower Mystery," introduced the action, mystery, and suspense themes. The boys continue to deliver thrills to this day.It all starts with the boys, Frank and Joe, on their motorcycles delivering important papers to a lawyer in Willowville for their father, Fenton Hardy. He's the well-known private investigator in Bayport. A reckless driver almost forces them over the embankment. It is not long before they find that their friend Chet's yellow jalopy has been stolen, possibly by the same red-haired driver! Stolen loot may be the issue. Later a dying criminal confesses that the loot has been stashed "in the tower" and the Hardy Boys make an astonishing discovery.

    The two share stories of pirates and have battles of wit while running wild on the sunny streets and rooftops. When Sherlock’s friend, Lupin, joins in on the fun, they all become fast friends. But the good times end abruptly when a dead body floats ashore on the nearby beach. The young detective trio will have to put all three of their heads together to solve this mystery.

    But when they persuade their parents to visit the ghost town of Blossom, one clue after another comes to light.Strange howlings waken them at night, strange eyes watch them as they walk the deserted streets. It becomes evident that more than one person is hunting for the treasure, and there are those who want to hinder Angie and Mark in their search.Angie meets Jinx Kobler, a girl her own age, living with her grandparents in the crumbling town. Jinx loves the old town and resents outsiders. She is oddly secretive about her mother and father, adding one more question to those which puzzle Angie.Who or what is Abednego? What are the black diamonds and where are they hidden? Why did the old prospecter make no use of the treasure himself? What queer animal haunts these empty streets at night and steals from the newcomers?

    Narrator Lady Grace, 13, youngest lady-in-waiting to Queen Elizabeth I, chooses between three suitors at a glittering ball. But murder descends on the Tudor court. Grace must use her intelligence, stealth, curious nature, and best friends - laundrymaid Ellie, acrobat Masou - to solve the threat to their Queen.

    But that was before he inherited twenty billion pounds, a Caribbean island, a yacht, and three estates from a great-aunt he never knew. With this fortune, however, comes a letter. One from his great-aunt Geraldine. One that tells Gerald that she was murdered, and that it's up to him to find out why.Along with his friends Ruby and Sam, Gerald embarks on a journey that will lead him from the British Museum to dodgy social clubs for the disgustingly rich to mansions in the English countryside to secret places far underground. Who was Geraldine Archer? And what secrets was she hiding? Unless Gerald, Sam, and Ruby can find out before the killer does, they may be next.

    It seems like a wish come true. But she quickly realizes that not all change is positive. Her dad has a mysterious new girlfriend, Moura, who slowly drives a wedge between Jen and her father. Furthermore, Moura has an unusually strong—almost obsessive—interest in the antiques that fill the mansion, especially a beautiful glass globe that Jen finds hanging in a window. When Jen’s cat accidentally breaks the globe, which Moura calls a “witch catcher,” strange things begin to happen. . . .    An odd-looking girl wearing a torn dress appears, seemingly out of nowhere, and Moura’s behavior becomes more sinister, leading Jen to believe that her father is a pawn in an evil scheme. Soon Jen finds herself caught in the midst of a supernatural war, with the fate of an enchanted race—and her family—at stake.    Inspired by the age-old legend of witch catchers, Mary Downing Hahn brings a magical cast of characters to life in this compelling fantasy adventure. Author’s note.