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.

In the Nevada desert, an experiment has gone horribly wrong. A cloud of nanoparticles (micro-robots) has escaped from the laboratory. This cloud is self-sustaining and self-reproducing. It is intelligent and learns from experience. For all practical purposes, it is alive. It has been programmed as a predator. It is evolving swiftly, becoming more deadly with each passing hour. Every attempt to destroy it has failed. And we are the prey.

In 1948, an alien starship crash-landed in the New Mexico desert and brought with it the key to mankind’s future. Code-named the Rho Project, the landing was shrouded in secrecy, and only the highest-ranking US government and military personnel knew it existed. Until now....

In the near future, at a moment no one will notice, all the dazzling technology that runs our world will unite and turn against us. Taking on the persona of a shy human boy, a childlike but massively powerful artificial intelligence known as Archos comes online and assumes control over the global network of machines that regulate everything from transportation to utilities, defense and communication.

Cruz Coronado leaves his tranquil home in Hawaii to join 23 talented kids from around the globe to train at the Explorer Academy with the world's leading scientists to become the next generation of great explorers. But for Cruz, there's more at stake. No sooner has he arrived at the Academy than he discovers that his family has a mysterious past with the organization that could jeopardize his future. In the midst of codebreaking and cool classes, new friends, and augmented reality expeditions, Cruz must tackle the biggest question of all: Who is out to get him, and why?

Readers of I Am Number Four, The Maze Runner, and Legend will love this exciting new adventure series by the co-creator of the groundbreaking television show Twin Peaks, with its unique combination of mystery, heart-pounding action, and the supernatural. Will West is careful to live life under the radar. At his parents' insistence, he's made sure to get mediocre grades and to stay in the middle of the pack on his cross-country team. Then Will slips up, accidentally scoring off the charts on a nationwide exam.

Now Will is being courted by an exclusive prep school...and followed by men driving black sedans.

There’s no doubt about it: These kids are nerds. Awkward, unpopular, uncool as uncool can be—and yet, there’s something about these “nerds” that nobody else knows. These dweebs are actually superspies who use their dorky skills to battle the evil Hyena and other villainous baddies.

For Joshua Dread, middle school is proving to be, well, awkward. Not only do bullies pick on him, but do you see those supervillains over there trying to flood the world? The ones that everyone, including his best friend, Milton, are rooting for Captain Justice to take down? They're the Dread Duo, and they just happen to be his parents. As if trying to hide his identity wasn't hard enough, Joshua has started leaving a trail of exploding pencils and scorched handprints in his wake, and only Sophie, the new girl in town with a mysterious past, seems unsurprised.

Silas Williams is the brilliant geneticist in charge of preparing the U.S. entry into the Olympic Gladiator competition, an internationally sanctioned bloodsport with only one rule: no human DNA is permitted in the design of the entrants. Silas lives and breathes genetics; his designs have led the United States to the gold in every previous event. But the other countries are catching up. Now, desperate for an edge in the upcoming Games, Silas’s boss engages an experimental supercomputer to design the genetic code for a gladiator that cannot be beaten.

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.

Sixteen-year-old Blake has always been the responsible one in his dysfunctional family. Quinn is his brother's opposite - a thrill-seeker who's always chasing the next scary rush. Quinn and Blake are in for the surprise of their lives when they're thrust into the world of a bizarre phantom carnival - and their souls are the price of admission. In order to save his brother, and himself, Blake must survive seven different carnival rides before dawn. Seven rides sounds easy. But each ride is full of unexpected dangers, because each ride is a reflection of one of Blake's deepest fears.

A generation ago, continent-sized storms called hypercanes caused the Earth to flood. The survivors were forced to retreat deep underground and build a new society. This is the story that sixteen-year-old Jansin Nordqvist has heard all of her life.

Big Hero 6 features brilliant robotics prodigy Hiro Hamada, who finds himself in the grips of a criminal plot that threatens to destroy the fast-paced, high-tech city of San Fransokyo. With the help of his closest companion - a robot named Baymax - Hiro joins forces with a reluctant team of first-time crime fighters on a mission to save their city.

Bestselling author Matthew Mather presents all four books in the Nomad series, now available in a single audiobook collection: Nomad, Sanctuary, Resistance, and Destiny.

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.