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.

    For the past five centuries, they have secretly served as guardians of the world. The Cahills command presidents, take down corrupt governments…and are currently led by a fourteen-year-old boy with a superhero complex.Dan Cahill may be young, but he’s nobody’s fool. So he knows he must act fast when he learns that Sinead Starling, a former friend who betrayed the family, is up to her eyeballs in a plot to control a deadly virus. But is Sinead behind the plot, or is she a hero trying to stop the virus from getting out? The search for Sinead will take Dan and his friends from Cuba to the Bermuda Triangle, where the fate of the world may just depend on whether the Cahills can trust a traitor…

    They thought the hunt for 39 Clues leading to the source of that power was over. They even thought they'd won. But Amy and Dan were wrong.One by one, distress calls start coming in from around the globe. Cahills are being kidnapped by a shadowy group known only as the Vespers. Now Amy and Dan have only days to fulfill a bizarre ransom request or their captured friends will start dying. Amy and Dan don't know what the Vespers want or how to stop them. Only one thing is clear. The Vespers are playing to win, and if they get their hands on the Clues . . . the world will be their next hostage.

    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.

    While solving some of the nation's most challenging crimes, his father always kept his head and did the right thing. Can Ali have the same strength and resolve?When Ali's best friend Gabe Qualls is reported missing, Ali is desperate to find him. At the same time, a string of burglaries targets his neighborhood---and even his own house. With his father on trial for a crime he didn't commit, it's up to Ali to search for clues and find his friend. But being a kid sleuth isn't easy---especially when your father warns you not to get involved!---and Ali soon learns that clues aren't always what they seem. Will his detective work lead to a break in Gabe's case or cause even more trouble for the Cross family?

    She is even more surprised when the test results come back positive, and she is sent to Attic Island, a former prison turned refuge—and quarantine colony—for the ill. The Scourge’s victims, Ani now among them, can only expect to live out short, painful lives there.However, Ani quickly discovers that she doesn’t know the whole truth about the Scourge or the Colony. She’s been caught in a devious plot, and, with the help of her best friend, Weevil, Ani means to uncover just what is actually going on. But will she and Weevil survive the Scourge—and the gorvernor’s wardens—long enough to make their escape and expose the cruel plan?

    What does "spudvetch" mean? Why do Mr Kidd's eyes flicker with fluorescent blue light when Charlie says spudvetch to him? A high-powered adventure can end only with a Boom!

    With time running out, Christopher must use every skill he’s learned to discover the key to a terrible secret with the power to tear the world apart.

    But she soon learns that this home isn't like any of the others - especially when she unearths the secret of the missing-and-presumed-dead billionaire, Gabriel Winterborne, who is neither missing nor dead but is actually living in a basement lair, sharpening his swords and looking for vengeance.Now that April knows Gabriel Winterborne is alive, she must turn to the other orphans to keep him that way. As a looming new danger threatens to take Gabriel down once and for all, they must use their individual talents to find a way to make sure this home for misfits isn't lost to them for ever.Because at the Winterborne Home, nothing is what it seems, no one is who they say they are and nowhere is safe. And now a ragtag group of orphans must unravel the riddle of a missing heir, a supposed phantom and a secret key, all without alerting the adults of Winterborne House that trouble is afoot.

    At seven, he was illegally hacking into computers. Now he's fourteen and studying for his World Domination degree, taking classes like embezzlement, misinformation, forgery, and infiltration at the institute founded by criminal mastermind Dr. Phineas Darkkon. Although Cadel may be advanced beyond his years, at heart he's a lonely kid. When he falls for the mysterious and brilliant Kay-Lee, he begins to question the moral implications of his studies for the first time. But is it too late to stop Dr. Darkkon from carrying out his evil plot?An engrossing thriller with darkness and humor, freaks and geeks, Evil Genius explores the fine line between good and evil in a strange world of manipulations and subterfuge where nothing is as it seems.

    step in . . .For more than fifty years, the country has been affected by a horrifying epidemic of ghosts. A number of Psychic Investigations Agencies have sprung up to destroy the dangerous apparitions.Lucy Carlyle, a talented young agent, arrives in London hoping for a notable career. Instead she finds herself joining the smallest, most ramshackle agency in the city, run by the charismatic Anthony Lockwood. When one of their cases goes horribly wrong, Lockwood & Co. have one last chance of redemption. Unfortunately this involves spending the night in one of the most haunted houses in England, and trying to escape alive.Set in a city stalked by spectres, The Screaming Staircase is the first in a chilling new series full of suspense, humour and truly terrifying ghosts. Your nights will never be the same again . . .

    Sherlock Holmes, age 14, unexpectedly summers with Farnham relations and befriends orphan Matt. Why does a dark cloud float from a corpse covered in red boils? Sherlock fights, runs, gets caught, drugged, whipped, ordered killed; defending bystander is fatally knifed. Americans logical tutor Amycus Crowe and daughter Virginia in well-fitting breeches help.

    Not only is he an orphan with an unfortunate nose, but he also has narcolepsy, a condition that gives him terrible nightmares and makes him fall asleep at the worst possible moments. Now he's being sent to a new orphanage, where he will encounter vicious bullies, selfish adults, strange circumstances – and a mystery that could change his life forever. Luckily, he does have one thing in his favor: He's a a genius.On his quest to solve the mystery, Nicholas finds enemies around every corner, but also friends in unexpected places – and discovers along the way that the greatest puzzle of all is himself.

    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.

    When first-class passenger Will Everett gets the key to a train car containing priceless treasures, he becomes the target of sinister figures from his past. To survive, Will joins a travelling circus, helped by ringmaster leader Mr. Dorian, and Maren, a girl his age and an expert escape artist.