For 500 years, they've protected the source of their power - the 39 Clues. And for 500 years, they've kept their secrets silent. Until now.This extraordinary stand-alone novel cracks open the Cahill vault to tell the story of the most coveted piece of artwork in the world, a masterpiece that has been the target of seven separate theft attempts: Jan van Eyck’s altarpiece at Ghent. OPERATION TRINITY chronicles the first Vesper attack on the altarpiece in the 1600s, then jumps to WWII and young Grace Cahill’s desperate bid to save the masterwork from the Nazis. The final piece of the novel tells the story of Ian and Natalie Kabra’s first solo operation and features an 11th hour appearance by Grace Cahill on her final mission.History will never be the same.

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

    Then he and a new friend, Chip, who's also adopted, begin receiving mysterious letters. The first one says, "You are one of the missing." The second one says, "Beware! They're coming back to get you."Jonah, Chip, and Jonah's sister, Katherine, are plunged into a mystery that involves the FBI, a vast smuggling operation, an airplane that appeared out of nowhere - and people who seem to appear and disappear at will. The kids discover they are caught in a battle between two opposing forces that want very different things for Jonah and Chip's lives.Do Jonah and Chip have any choice in the matter? And what should they choose when both alternatives are horrifying?With Found, Margaret Peterson Haddix begins a new series that promises to be every bit as suspenseful as Among the Hidden, and proves her, once again, to be a master of the page-turner.

    Her father disappeared, her mother is a washed-up beauty-pageant winner, and now Ivy and her mother have moved into a ramshackle house on Gumm Street. Ivy's new neighbors--bookish Pru, stuck-up Cat, and wannabe adventurer Franny--are worse than unfriendly. But then a mysterious pair of ruby red slippers turns up, and the four girls are swept away...not to OZ, but to the jaw-droppingly strange lands of SPOZ, and SPUDZ, and OOZE, pursued by the fashionably mad Cha-Cha Staccato, who bears a frightening resemblance to a certain wicked witch....Ages: 8 -12

    This world is on the brink of war, and Gregor's arrival is no accident. A prophecy foretells that Gregor has a role to play in the Underland's uncertain future. Gregor wants no part of it -- until he realizes it's the only way to solve the mystery of his father's disappearance. Reluctantly, Gregor embarks on a dangerous adventure that will change both him and the Underland forever.

    When, as a result of "the Loosening," the precious family heirloom, the Luggertuck Lump (quite literally a lump), goes missing, the Luggertucks look for someone to blame. Is it Horton Halfpott, the good-natured but lowly kitchen boy who can't tell a lie? Or one of the many colorful cast members in this silly romp of a mystery.

    It sounds like a dream come true! But lately, Ben has been wonder if he’s going to like an amusement park in the middle of his town—with all the buses and traffic and eight dollar slices of pizza. It’s going to change everything. And, Ben is not so big on all the new changes in his life, like how his dad has moved out and started living in the marina on what used to be the "family” sailboat. Maybe it would be nice if the school just stayed as it is. He likes the school. Loves it, actually. It’s over 200 years old and sits right on the harbor. The playground has ocean breezes and the classrooms have million dollar views…MILLION DOLLAR views. And after a chance—and final—run-in with the school janitor, Ben starts to discover that these MILLION DOLLAR views have a lot to do with the deal to sell the school property. But, as much as the town wants to believe it, the school does not belong to the local government. It belongs to the CHILDREN and these children have the right to defend it! Don’t think Ben, his friend Jill (and the tag-along Robert) can ruin a multimillion dollar real estate deal? Then you don’t know the history and the power of the Keepers of the School. A suspenseful six book series, book one, We the Children, starts the battle on land and on sea. It’s a race to keep the school from turning into a ticket booth and these kids are about to discover just how threatening a little knowledge can be.

    At the same time, Curdie overhears a fiendish plot by the goblins. Princess Irene & Curdie must make sense of their separate knowledge & foil the goblins' schemes.

    This is a story filled with humor, adventure, and gadgetry that only a genius like Fleming could create.From the Hardcover edition.

    But when a mysterious green violin enters his life he begins to imagine a life of freedom. Hannah is a soft-hearted, strong-willed girl from the tenements, who supports her family as a hotel maid when tragedy strikes and her father can no longer work. She learns about a hidden treasure, which she knows will save her family — if she can find it. And Frederick, the talented and intense clockmaker's apprentice, seeks to learn the truth about his mother while trying to forget the nightmares of the orphanage where she left him. He is determined to build an automaton and enter the clockmakers' guild — if only he can create a working head.Together, the three discover they have phenomenal power when they team up as friends, and that they can overcome even the darkest of fears.

    Readers who loved Percy Jackson will be eager to follow our heroes on this six-book, six-novella journey and excited to enter a sweepstakes to participate in a real-life scavenger hunt hosted by Tony Abbott that lets the reader become part of the story.It all began when four friends-Wade, Lily, Darrel, and Becca-received a strange, coded email from Wade's uncle Henry shortly before the old man's sudden death. They set off for Germany to attend the funeral with Wade's father, Roald, and discover that Uncle Henry left them yet another baffling message that they suspect is the key to figuring out how and why he died.The message leads to a clue, and the more clues they discover, the farther they travel down a treacherous path toward an ancient, guarded secret. Soon they are in a breathless race across the globe, running for their lives as a dangerous shadow organization chases them around every corner. Their only hope of saving themselves-and the world that they know-is to find twelve magical relics from a hidden past that will unlock the Copernicus Legacy.

    A found cipher. A game begins . . . .Twelve-year-old Emily is on the move again. Her family is relocating to San Francisco, home of her literary idol: Garrison Griswold, creator of the online sensation Book Scavenger, a game where books are hidden all over the country and clues to find them are revealed through puzzles. But Emily soon learns that Griswold has been attacked and is in a coma, and no one knows anything about the epic new game he had been poised to launch. Then Emily and her new friend James discover an odd book, which they come to believe is from Griswold and leads to a valuable prize. But there are others on the hunt for this book, and Emily and James must race to solve the puzzles Griswold left behind before Griswold's attackers make them their next target.

    In fact, everything about Heidi and her mentally disabled mother's past is a mystery. When a strange word in her mother's vocabulary begins to haunt her, Heidi sets out on a cross-country journey in search of the secrets of her past.Far away from home, pieces of her puzzling history come together. But it isn't until she learns to accept not knowing that Heidi truly arrives.

       The Willoughby children—Timothy, twins Barnaby A and Barnaby B, and their sister Jane—are fond all old-fashioned things, but especially old-fashioned adventures. What they aren't fond of, however, are their parents. Truth be told, their parents aren't the fondest of them, either, and they're concocting an evil plan to get rid of their children once and for all!   Both parents and children have plenty of dastardly ideas and tricks up their sleeves. The only thing they don't have is any idea of what lies between them and a happily-ever-after.   Complete with a cheeky glossary and bibliography, this hilarious and wonderfully old-fashioned parody pays playful homage to classic works of children’s literature like Mary Poppins and A Christmas Carol.

    Luckily, Miss Penelope Lumley is no ordinary governess. Only fifteen years old and a recent graduate of the Swanburne Academy for Poor Bright Females, Penelope embraces the challenge of her new position. Though she is eager to instruct the children in Latin verbs and the proper use of globes, first she must help them overcome their canine tendencies. But mysteries abound at Ashton Place: Who are these three wild creatures, and how did they come to live in the vast forests of the estate? Why does Old Timothy, the coachman, lurk around every corner? Will Penelope be able to teach the Incorrigibles table manners and socially useful phrases in time for Lady Constance's holiday ball? And what on earth is a schottische?