For 500 years, the Cahills have been the most powerful family in the world. 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.

At only seventeen years old, Ian Kabra is head of the Cahills, the most powerful family in the world. He has presidents on speed dial, generals at his beck and call. Ian knows he's an ideal leader and the only man for the job. There's just one small problem: He's already messed up big time. A Cahill from the past calling himself the Outcast has risen to challenge Ian with an impossible test. The Outcast has re-created four of history's greatest disasters and dared Ian to stop him.

The Cahill family has a secret. For five hundred years, they have guarded the 39 Clues - thirty-nine ingredients in a serum that transforms whomever takes it into the most powerful person on earth. If the serum got into the wrong hands, the disaster would rock the world. So certain Cahills have always made it their mission to keep the serum safe, buried, locked away. Until now. Thirteen-year-old Dan Cahill and his older sister, Amy, are the latest guardians of the Clues. They think they've done everything right, but a tiny mistake leads to catastrophe.

Amy and Dan find themselves in a new global race but this time, everything’s different. Those closest to them might be working for the enemy, and Amy and Dan are forced to ask themselves how far they’re willing to go to save the kidnapped Cahills. How much can you risk when there’s no one to trust?

What would happen if you discovered that your family was one of the most powerful in human history? What if you were told that the source of the family's power was hidden around the world, in the form of 39 Clues? What if you were given a choice - take a million dollars and walk away...or get the first Clue? If you're Amy and Dan Cahill, you take the Clue - and begin a very dangerous race.

As the son of Hades, Nico di Angelo has been through so much, from the premature deaths of his mother and sister, to being outed against his will, to losing his friend Jason during the trials of Apollo. But there is a ray of sunshine in his life—literally: his boyfriend, Will Solace, the son of Apollo. Together the two demigods can overcome any obstacle or foe. At least, that's been the case so far . . . Now Nico is being plagued by a voice calling out to him from Tartarus, the lowest part of the Underworld.

Ben Ripley may only be in middle school, but he's already pegged his dream job: CIA or bust. Unfortunately for him, his personality doesn't exactly scream "secret agent". In fact Ben is so awkward, he can barely get to school and back without a mishap. Because of his innate nerdiness, Ben is not surprised when he is recruited for a magnet school with a focus on science - but he's entirely shocked to discover that the school is actually a front for a junior CIA academy.

When best friends Dak Smyth and Sera Froste stumble upon the secret of time travel - a hand-held device known as the Infinity Ring - they're swept up in a centuries-long secret war for the fate of mankind. Recruited by the Hystorians, a secret society that dates back to Aristotle, the kids learn that history has gone disastrously off course. Now it's up to Dak, Sera, and teenage Hystorian-in-training Riq to travel back in time to fix the Great Breaks . . . and to save Dak's missing parents while they're at it.

Fourteen-year-old Ozzy lives near Portland, Oregon, and is desperate for help. His scientist parents have been kidnapped after discovering a formula that enables mind control. Their work was so top secret that Ozzy is afraid to go to the police, but without help, he fears he'll never find his parents. Then he stumbles across a classified ad in the local newspaper that says "Wizard for Hire. Call 555-SPEL." Ozzy has read about wizards in books like Harry Potter, but wizards couldn't exist today, could they? After Ozzy meets the wizard Labyrinth - a.k.a. Rin - he's even more skeptical.

Magnus Chase has always been a troubled kid. Since his mother's mysterious death, he's lived alone on the streets of Boston, surviving by his wits, keeping one step ahead of the police and the truant officers. One day, he's tracked down by an uncle he barely knows - a man his mother claimed was dangerous. Uncle Randolph tells him an impossible secret: Magnus is the son of a Norse god. The Viking myths are true. The gods of Asgard are preparing for war. Trolls, giants and worse monsters are stirring for doomsday.

For centuries, mystical creatures of all description were gathered to a hidden refuge called Fablehaven to prevent their extinction. The sanctuary survives today as one of the last strongholds of true magic in a cynical world. Enchanting? Absolutely. Exciting? You bet. Safe? Well, actually, quite the opposite... Kendra and her brother Seth have no idea their grandfather is the current caretaker of Fablehaven.

In the long-awaited sequel to Fablehaven, the dragons who have been kept at the dragon sanctuaries no longer consider them safe havens but prisons, and they want their freedom. The dragons are no longer our allies....

Ana Dakkar is a freshman at Harding-Pencroft Academy, a five-year high school that graduates the best marine scientists, naval warriors, navigators, and underwater explorers in the world. Ana's parents died while on a scientific expedition two years ago, and the only family's she's got left is her older brother, Dev, also a student at HP. Ana's freshman year culminates with the class' weekend trial at sea, the details of which have been kept secret. She only hopes she has what it'll take to succeed.

Charlie Thorne is a genius. Charlie Thorne is a renegade. Charlie Thorne isn’t going down without a fight. After tracking down incredible discoveries by Einstein and Darwin, Charlie is back. This time, the great ruler Cleopatra has left behind an extremely valuable and powerful treasure, its location encoded on an ancient stone tablet.

Sara Martinez is a hacker. She recently broke into the New York City foster care system to expose her foster parents as cheats and lawbreakers. However, instead of being hailed as a hero, Sara finds herself facing years in a juvenile detention facility and banned from using computers for the same stretch of time. Enter Mother, a British spy who not only gets Sara released from jail but also offers her a chance to make a home for herself within a secret MI5 agency. Operating out of a base in Scotland, the City Spies are five kids from various parts of the world.

During a trek to Loch Ness, Scotland, a young Charles Darwin encounters a mysterious and terrifying creature that provides a spark for his evolutionary theory. Almost 200 years later and across the Channel in Paris, the Eiffel Tower is under attack. Only through detective work, intuition, and a judicious application of high-tech weaponry does former Army combat engineer Tyler Locke prevent a massacre.

The human race is all but extinct after a war with Partials - engineered organic beings identical to humans - has decimated the population. Reduced to only tens of thousands by RM, a weaponized virus to which only a fraction of humanity is immune, the survivors in North America have huddled together on Long Island while the Partials have mysteriously retreated. The threat of the Partials is still imminent, but, worse, no baby has been born immune to RM in more than a decade. Our time is running out.

Natasha Romanoff is one of the world's most lethal assassins. Trained from a young age in the arts of death and deception, Natasha was given the title of Black Widow by Ivan Somodorov, her brutal teacher at the Red Room, Moscow's infamous academy for operatives.

The ultimate secret. The ultimate agent. The President's vampire. Zach Barrows is an ambitious young White House staffer whose career takes an unexpected turn when he's partnered with Nathaniel Cade, a secret agent sworn to protect the President. But Cade is no ordinary civil servant.

She's an elite spy, working for an agency so secret only three people know it exists. Trained by the best of the best, she has honed her body, her instincts, and her intellect to become the perfect weapon. Before special operative Chandler was forced to FLEE, she executed the most difficult missions - and most dangerous people - for the government. So when she’s tasked with saving a VIP’s daughter from human traffickers, Chandler expects the operation to be by the numbers…until she uncovers a secret that will endanger the entire population of New York City, and possibly the world.

When you have to kill the same terrorist twice in one week there’s either something wrong with your world or something wrong with your skills - and there’s nothing wrong with Joe Ledger’s skills. And that’s both a good and a bad thing. It’s good because he’s a Baltimore detective who has just been secretly recruited by the government to lead a new task force created to deal with the problems that Homeland Security can’t handle....

Government secrets are being sold, and the newly sworn in president of the United States already feels out of options. Without knowing the full scope of the scandal, the president decides to turn to the one person he knows he can trust - former FBI agent Elizabeth James. Her deep distrust of the system is rooted in her unfair discharge from service. Now she sees a chance to restore her reputation and send a message to those who would use their power to destroy others' lives.

Maisie Danger Brown just wanted to get away from home for a bit and see something new. She never intended to fall in love with a boy at space camp. And she certainly never intended to stumble into a frightening plot that just might destroy everything and everyone she cares about. But now there's no going back - Maisie's the only thing standing between danger and annihilation. She must become the hero the world needs before she loses her heart... and her life.

When Lyric Walker was 14 years old, her life was turned upside down when she witnessed a world-changing event - the arrival of the Triton, a five-nation race of warrior merpeople who walked out of the sea and camped on the beaches of modern-day Coney Island. Suddenly her neighborhood was home to a new minority group numbering in the tens of thousands. But the Triton's arrival also revealed a shocking family secret: Her own mother was a mermaid.

They said his uncle Ian died in a car accident. Alex Rider knows that's a lie, and the bullet holes in his uncle's car confirm the truth. But nothing can prepare him for the news that the uncle he always thought he knew was really a spy for Britain's top-secret intelligence agency. Enlisted to find his uncle's killers and complete Ian's final mission, Alex suddenly finds himself caught in a deadly game of cat and mouse, with no way out.

In the near future, the nano-drug Nexus can link mind to mind. There are some who want to improve it. There are some who want to eradicate it. And there are others who just want to exploit it. When a young scientist is caught improving Nexus, he’s thrust over his head into a world of danger and international espionage, with far more at stake than anyone realizes.

When out-of-shape IT technician Roen wakes up and starts hearing voices in his head, he naturally assumes he’s losing it. He isn’t. As of last night, he has a passenger in his brain - an ancient alien life-form called Tao, whose race crash-landed on Earth before the first fish crawled out of the oceans. Over the millennia his people have trained human heroes to be great leaders, to advance our species at a rate far beyond what it would have achieved on its own. Split into two opposing factions - the peace-loving, but under-represented Prophus, and the savage, powerful Genjix - the aliens have been in a state of civil war for centuries.

It's 1948, and World War II has just ended. Berlin is in pieces, torn apart by bullets, bombs, and bloodshed. But a particular scientist has survived - one with vital knowledge of an ancient weapon. When Endgame spies learn of the news, Boone, a Cahokian, and Ariadne, a Minoan, are each sent undercover to find the scientist amid the snowy rubble. But when their paths intertwine, the last thing they expect is to let their guards down and work together.

Warning: The next terrorist attack on American soil is coming...sooner than you think. They can strike anytime, anywhere. A public landmark. A suburban shopping mall. And now, the human body itself. Three Middle Eastern terrorists have been injected with a biological weapon, human time bombs unleashed on American soil. They are prepared to die. To spread their disease. To annihilate millions. If America hopes to fight this enemy from within, we need a new kind of weapon. Meet Special Agent Jericho Quinn. Air Force veteran. Champion boxer. Trained assassin.

In the blink of an eye, everyone disappears. Gone. Except for the young. There are teens, but not one single adult. Just as suddenly, there are no phones, no Internet, no television. No way to get help. And no way to figure out what's happened. Hunger threatens. Bullies rule. A sinister creature lurks. Animals are mutating. And the teens themselves are changing, developing new talents - unimaginable, dangerous, deadly powers - that grow stronger by the day. It's a terrifying new world.