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.

    When Arthur, Ren and Cecily investigate a mysterious explosion on their way to school, they find themselves trapped aboard The Principia - a scientific research ship sailing through hazardous waters, captained by one Isaac Newton.Lost in the year 2473 in the Wonderscape, an epic in-reality adventure game, they must call on the help of some unlikely historical heroes, to play their way home before time runs out.Jumanji meets Ready Player One in this fast-paced adventure featuring incredible real-life heroes, from the internationally bestselling author of The Uncommoners series.

    A riveting ghost story and captivating adventure, this tale will have you guessing at every turn!Harper doesn’t trust her new home from the moment she steps inside, and the rumors are that the Raine family’s new house is haunted. Harper isn’t sure she believes those rumors, until her younger brother, Michael, starts acting strangely. The whole atmosphere gives Harper a sense of déjà vu, but she can’t remember why. She knows that the memories she’s blocking will help make sense of her brother’s behavior and the strange and threatening sensations she feels in this house, but will she be able to put the pieces together in time?

    As Coke and Pepsi dodge nefarious villains from the Pez museum in California all the way to the Infinity Room in Wisconsin, black-and-white photographs and maps put young readers right into the action. And don't miss the next leg of the journey in The Genius Files: Never Say Genius!Supports the Common Core State Standards

    Clair is going to be a lawyer. She was the fastest girl in New York City. She knows everything there is to know about the brain. And now that she’s living in Crow, Iowa, she wants to ride into her first day of school on a cow named Willowdale Princess Deon Dawn. But Gwyn isn’t in Crow, Iowa, just for royal cows. Her family has moved there, where her parents grew up, in the hopes of jogging her mother Vienna’s memory. Vienna has been suffering from memory loss since Gwyn was four. She can no longer remember anything past the age of thirteen, not even that she has two young daughters. Gwyn’s father is obsessed with finding out everything he can to help his wife, but Gwyn’s focused on problems that seem a little more within her reach. Like proving that the very strange Gaysie Cutter who lives next door is behind the disappearance of her only friend, Wilbur Truesdale. Gwyn is sure she can crack the case, but when she does she finds that not all of her investigations lead her to the places she would have expected. In fact they might just lead her to learn about the mother she’s been doing her best to forget.

    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.

    That's because on Tuesdays the castle adds a new room, a turret, or sometimes even an entire wing. No one ever knows what the castle will do next, and no one-other than Celie, that is-takes the time to map out the new additions. But when King and Queen Glower are ambushed and their fate is unknown, it's up to Celie, with her secret knowledge of the castle's never-ending twists and turns, to protect their home and save their kingdom. This delightful book from a fan- and bookseller-favorite kicks off a brand-new series sure to become a modern classic.

    But there are sinister forces at work that want to destroy all knowledge. To save the library, Lenora will have to test her limits and uncover secrets hidden among its shelves.

    Hannibal presents a thrilling adventure through history, complete with mysteries, secret items, codes, and a touch of magic in this stunning middle grade debut. Thirteen-year-old Jack Buckles is great at finding things. Not just a missing glove or the other sock, but things normal people have long given up on ever seeing again. If only he could find his father, who has disappeared in London without a trace. But Jack s father was not who he claimed to be. It turns out that he was a member of a secret society of detectives that has served the crown for centuries and membership into the Lost Property Office is Jack s inheritance. Now the only way Jack will ever see his father again is if he finds what the nefarious Clockmaker is after: the Ember, which holds a secret that has been kept since the Great Fire of London. Will Jack be able to find the Ember and save his father, or will his talent for finding things fall short?"

    Did she lock the front door? Is there a terrible reason her mom is late? Recently her anxiety has been getting out of control, but one thing that has always soothed her is drawing. Kiki's sketchbook is full of fanciful doodles of the rich Indian myths and legends her mother has told her over the years.One day, her sketchbook's calming effect is broken when her mythological characters begin springing to life right out of its pages. Kiki ends up falling into the mystical world she drew, which includes a lot of wonderful discoveries like the band of rebel kids who protect the kingdom, as well as not-so-great ones like the ancient deity bent on total destruction. As the one responsible for creating the evil god, Kiki must overcome her fear and anxiety to save both worlds--the real and the imagined--from his wrath. But how can a girl armed with only a pencil defeat something so powerful?

    Instead, it marks the beginning of a whole new life. Soon he has become the most successful -- and elusive -- burglar in Victorian London, plotting daring raids and using London's new sewer system to escape. He adopts a dual existence to fit his new lifestyle, taking on the roles of a respectable, wealthy gentleman named Montmorency and his corrupt servant, Scarper.

    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?

    Turns out he's Mr. Charles, her dad's new boss at the oil and gas company, and he's alarmingly interested in Nizhoni and her brother, Mac, their Navajo heritage, and the legend of the Hero Twins. Nizhoni knows he's a threat, but her father won't believe her.When Dad disappears the next day, leaving behind a message that says "Run!", the siblings and Nizhoni's best friend, Davery, are thrust into a rescue mission that can only be accomplished with the help of Diné Holy People, all disguised as quirky characters. Their aid will come at a price: the kids must pass a series of trials in which it seems like nature itself is out to kill them. If Nizhoni, Mac, and Davery can reach the House of the Sun, they will be outfitted with what they need to defeat the ancient monsters Mr. Charles has unleashed. But it will take more than weapons for Nizhoni to become the hero she was destined to be . . .

    * Later, that motorcycle somehow ended up at the bottom of a canal. * Billy isn't the type to let things go.Some facts about Billy's family: * They've lived in six different Florida towns because Billy's mom always insists on getting a house near a bald eagle nest. * Billy's older sister is dating a jerk. It's a mystery. * Billy's dad left when he was four, and Billy knows almost nothing about him. * Billy has just found his dad's address--in Montana.This summer, Billy will fly across the country, hike a mountain, float a river, dodge a grizzly bear, shoot down a spy drone, save a neighbor's cat, save an endangered panther, and then try to save his own father.

    until he found out he already WAS one. It all starts here: The thrilling story of Steve Brixton's first case. Our hero has a national treasure to recover, a criminal mastermind to unmask, and a social studies report due Monday -- all while on the run from cops, thugs, and secret-agent librarians. Since when can librarians rappel from helicopters? Does Steve have any brothers or sisters? If not, then why is this series called The Brixton Brothers? You will solve all these mysteries and many more by the time you finish The Case of the Case of Mistaken Identity. We think you'll agree: Steve Brixton's first adventure is his best adventure yet.