L. Konisburg, this middle-grade mystery adventure is inspired by the real life of Viviani Joffre Fedeler, born and raised in the New York Public Library.Eleven-year-old Viviani Fedeler has spent her whole life in the New York Public Library. She knows every room by heart, except the ones her father keeps locked. When Viviani becomes convinced that the library is haunted, new girl Merit Mubarak makes fun of her. So Viviani decides to play a harmless little prank, roping her older brothers and best friend Eva to help out.But what begins as a joke quickly gets out of hand, and soon Viviani and her friends have to solve two big mysteries: Is the Library truly haunted? And what happened to the expensive new stamp collection? It's up to Viviani, Eva, and Merit (reluctantly) to findout.

    Twelve-year-old Isaveth is poor, but she’s also brave, loyal, and zealous in the pursuit of justice—which is lucky, because her father has just been wrongfully arrested for murder. Isaveth is determined to prove her innocence. Quiz, the eccentric eyepatch-wearing street boy who befriends her, swears he can’t resist a good mystery. Together they set out to solve the magical murder of one of Tarreton’s most influential citizens and save Isaveth’s beloved Papa from execution.But each clue is more perplexing than the next. Was the victim truly killed by Common Magic—the kind of crude, cheap spell that only an unschooled magician would use—or was his death merely arranged to appear that way? And is Quiz truly helping her out of friendship, or does he have hidden motives of his own? Isaveth must figure out who she can trust if she’s to have any hope of proving her Papa’s innocence in time. . .

    Letting go is hard - until Granny's long-dead mammy appears at Mary's door, returning to help her dying daughter say goodbye. But first she needs someone to drive them all on a visit to the past.

    Violet never wanted to move to Perfect.Who wants to live in a town where everyone has to wear glasses to stop them going blind? And who wants to be neat and tidy and perfectly behaved all the time?But Violet quickly discovers there's something weird going on – she keeps hearing noises in the night, her mum is acting strange and her dad has disappeared.When she meets Boy she realizes that her dad is not the only person to have been stolen away...and that the mysterious Watchers are guarding a perfectly creepy secret!

    When their beloved aunt--matriarch of the world's most powerful family--dies, orphaned siblings Amy and Dan Cahill compete with less honorable Cahill descendants in a race around the world to find cryptic clues to a mysterious fortune.Book includes game cards which the reader may use to play an online version of the treasure hunt.

    With the family's fortunes considerably reduced in his absence, the children and their mother are forced to live in a simple country cottage near a railway station. There the young trio—Roberta, Peter, and young Phyllis—befriend the porter and station master.The youngsters' days are filled with adventure and excitement, including their successful attempt to avert a horrible train disaster; but the mysterious disappearance of their father continues to haunt them.The solution to that painful puzzle and many other details and events of the children's lives come to vivid life in this perennial favorite, a story that has captivated generations of readers and, more recently, delighted television and movie audiences. In this inexpensive, unabridged edition, it will charm a whole new audience of young readers with its warmth and appeal.

    Fifty-seven years later, the enigmatic architects disappeared, leaving behind for the people of New York the Old York Cipher—a puzzle laid into the shining city they constructed, at the end of which was promised a treasure beyond all imagining. By the present day, however, the puzzle has never been solved, and the greatest mystery of the modern world is little more than a tourist attraction.Tess and Theo Biedermann and their friend Jaime Cruz live in a Morningstarr apartment house—until a real estate developer announces that the city has agreed to sell him the five remaining Morningstarr buildings. Their likely destruction means the end of a dream long-held by the people of New York. And if Tess, Theo and Jaime want to save their home, they have to prove that the Old York Cipher is real. Which means they have to solve it.

    She was caught cheating in school, and then one day, her little sister Emma disappeared while walking home from school. She never returnedWhen Quinn's best friend Kara has to move away, she goes on one last trip with Kara and her family. They stop over at the first hotel they see, a Victorian inn that instantly gives Quinn the creeps, and she begins to notice strange things happening around them. When Kara's parents and then brother disappear without a trace, the girls are stranded in a hotel full of strange guests, hallways that twist back in on themselves, and a particularly nasty surprise lurking beneath the floorboards. Will the girls be able to solve the mystery of what happened to Kara's family before it's too late?

    But she’s about to discover that witches aren’t just the stuff of movies, books, and spooky stories. When some eighth-grade bullies try to ruin her Halloween, something really strange happens. It turns out that Founder’s Bluff, Massachusetts, has a centuries-old history of witch drama. And, surprise: Moth’s family is at the center of it all! When Moth’s new powers show up, things get totally out-of-control. She meets a talking cat, falls into an enchanted diary, and unlocks a hidden witch world. Secrets surface from generations past as Moth unravels the complicated legacy at the heart of her town, her family, and herself.

    Rock-climbing walls on the playground and golden bowls of candy on every desk? Gourmet meals in the cafeteria, served by waiters? Optional homework and two recess periods a day? It's every kids's dream.But Lorelei and her new friend Andrew are pretty sure it's too good to be true. Together they uncover a sinister mystery, one with their teacher, the beautiful Ms. Morrigan, at the very center.Then Andrew disappears. Lorelei has to save him, even if that means facing a past she'd like to forget – and taking on a teacher who's a real witch.What Lorelei and Andrew discover chills their bones – and might even pick them clean!

    When he mysteriously goes missing, his little sister, 13-year-old Amari Peters, can’t understand why it’s not a bigger deal. Why isn’t his story all over the news? And why do the police automatically assume he was into something illegal? Then Amari discovers a ticking briefcase in her brother’s old closet. A briefcase meant for her eyes only. There was far more to Quinton, it seems, than she ever knew. He’s left her a nomination for a summer tryout at the secretive Bureau of Supernatural Affairs. Amari is certain the answer to finding out what happened to him lies somewhere inside, if only she can get her head around the idea of mermaids, dwarves, yetis and magicians all being real things, something she has to instantly confront when she is given a weredragon as a roommate. Amari must compete against some of the nation’s wealthiest kids—who’ve known about the supernatural world their whole lives and are able to easily answer questions like which two Great Beasts reside in the Atlantic Ocean and how old is Merlin? Just getting around the Bureau is a lesson alone for Amari with signs like ‘Department of Hidden Places this way, or is it?’ If that all wasn’t enough, every Bureau trainee has a talent enhanced to supernatural levels to help them do their jobs – but Amari is given an illegal ability. As if she needed something else to make her stand out. With an evil magican threatening the whole supernatural world, and her own classmates thinking she is an enemy, Amari has never felt more alone. But if she doesn’t pass the three tryouts, she may never find out what happened to Quinton.

    The creaky smuggler’s inn is always quiet during this season, and twelve-year-old Milo, the innkeepers’ adopted son, plans to spend his holidays relaxing. But on the first icy night of vacation, out of nowhere, the guest bell rings. Then rings again. And again. Soon Milo’s home is bursting with odd, secretive guests, each one bearing a strange story that is somehow connected to the rambling old house. As objects go missing and tempers flare, Milo and Meddy, the cook’s daughter, must decipher clues and untangle the web of deepening mysteries to discover the truth about Greenglass House—and themselves.

    Here, fourteen-year-old Janie meets a mysterious apothecary and his son, Benjamin Burrows—a fascinating boy who’s not afraid to stand up to authority and dreams of becoming a spy. When Benjamin’s father is kidnapped, Janie and Benjamin must uncover the secrets of the apothecary’s sacred book, the Pharmacopoeia, in order to find him, all while keeping it out of the hands of their enemies—Russian spies in possession of nuclear weapons. Discovering and testing potions they never believed could exist, Janie and Benjamin embark on a dangerous race to save the apothecary and prevent impending disaster.

    Suddenly the sky peels away like fabric and from the gaping hole fall two curious-looking children. Peter Schock and Kate Dyer have fallen straight from the twenty-first century, thanks to an experiment with an antigravity machine. Before Gideon and the children have a chance to gather their wits, the Tar Man takes off with the machine -- and Kate and Peter's only chance of getting home. Soon Gideon, Kate, and Peter are swept into a journey through eighteenth-century London and form a bond that, they hope, will stand strong in the face of unfathomable treachery.

    Cecily and Jeremy have been sent to live with their uncle Peregrine in the English countryside, safe from the war, along with a young refugee named May. But when Cecily and May find two mysterious boys hiding in the ruins of a nearby castle, an extraordinary adventure begins.