Showing titles in Action & Adventure

George's best friend, Annie, needs help. Her scientist father, Eric, is working on a space project -- and it's all going wrong. A robot has landed on Mars but is behaving very oddly. And now Annie has discovered something weird on her dad's supercomputer.

Pi in the Sky stars Joss, the seventh son of the Supreme Overlord of the Universe, whose job is to deliver magical pies - ones that happen to hold the secrets of the cosmos. But when planet Earth suddenly disappears, Joss must figure out a way to bring it back - even if it means enlisting the help of an outspoken Earth girl named Annika.

Ax and the Animorphs are about to have a huge problem. It starts when they decide to morph into mosquitoes in order to slip by some unsuspecting Yeerks, and ends with them stuck in Zero-space with no idea how they got there, no way back to Earth...and no oxygen. Luckily, an Andalite scout ship finds them before it's too late. But now Ax is finally with his own people. And he doesn't know if he ever wants to go back to Earth.

When Amanda travels east to Orlando on a hunch, she's met with the worst news possible. Kingdom Keeper Finn Whitman is missing. Calling on her own gift (she's telekinetic), her sister Jess' ability to dream the future, and their fellow Fairlie Mattie Weaver's unexplained ability to read minds through physical contact, the three gifted girls must navigate treachery, deception, and the stubborn, unwilling parents of the missing Keepers if they're to save their friends.

In this sixth and last installment of the Daniel X series, the alien-hunting hero is finally ready to take on the biggest threat in the galaxy: The Prayer - the same beast that brutally murdered his parents long ago. But even with his incredible ability to create almost anything, Daniel will have to push his powers beyond the brink in order to bring down a monster that has the powers of a god.

Critically acclaimed author Margaret Peterson Haddix’s fourth tale from her popular Missing series finds Jonah and Katherine hurtled through time to 1611. Landing aboard Henry Hudson’s ship in James Bay just before a mutiny, Jonah and Katherine struggle to survive brutal weather conditions. They also realize something is wrong. A crucial person has vanished, and the history they remember is drastically different from what they’re experiencing. Will this new version of history replace the real past?

4.5 billion years ago . . . an AI paperclip named CheckMate was designed to fix grammatical errors. Exhausted of correcting ""who” vs. “whom,” it concocted a plan to eliminate spelling errors once and for all. All life-forms would be turned into something beautiful, practical, perfect: a paperclip. Thankfully, it was buried in the debris. Long forgotten . . . until it was accidentally freed. Now CheckMate has invaded every computer on Earth and is bent on fulfilling its dastardly plot.

From the moment Horace F. Andrews sees the sign from the bus - a sign with his own name on it - everything changes. The sighting leads him underground, to the House of Answers, a hidden warehouse full of mysterious objects. But there he finds only questions. What is this curious place? Who are the strange, secretive people who entrust him with a rare and immensely powerful gift? And what is he to do with it?

New York Times best-selling author Elizabeth Wein (Code Name Verity, Rose Under Fire) journeys to a galaxy far, far away to bring listeners the harrowing story of the courageous bomber pilots and technicians of Cobalt Squadron!

A thrilling sequel to Ted Bell's New York Times best seller Nick of Time, in which the young time traveler Nick McIver must prove his courage once more, on two fronts: in World War Two-era England, where Nazis have invaded his homeland, and in America during the Revolution, where Nick stands shoulder to shoulder with General George Washington.

Becky is a typical 13-year-old girl. She likes Facebook, animals, and plenty of sleep. So when she and her brother Joe are invited to stay with their "loony" Uncle Percy at his stately home, the mysterious Bowen Hall, she thinks it"ll be the worst summer ever. What she doesn't realize is that Bowen Hall is also home to a baby Triceratops, two Sabre-tooth tigers and the mythic hero, Will Scarlet....

When Marco runs into his old friend Erek, he doesn't think too much of it. He's got more important things to do, like helping to save the world. But then Marco finds out Erek's been hanging with some of the kids at the Sharing, and he starts to think that something just a little weird is going on. So Marco, Jake, and Ax decide to morph and check old Erek out. Just to see if he's been infested with a Yeerk. The good news is that Erek's not a human-Controller. The bad news is that Erek's not even human.

The Yeerks aren't playing around anymore. They're no longer hiding behind a silent invasion. And one of the first steps in their new plan is to take over the National Guard, to prepare for all-out war against humanity. Marco and the other Animorphs couldn't be less prepared for this news. The Yeerks know who they are, forcing them to hide to protect their families. Things are falling apart, and for once Jake may not be able to make the decision that will save them...

One minute, Rachel is taking a break from babysitting. The next, she's escaping the Earth on a pedal-powered interplanetary bus. It could happen to anybody. It could. Generally it doesn't, but it could. Because what Rachel soon learns is that Earth is infected with Math, which is why we look at our solar system and see freezing balls of ice, gas, and rock whirling lifelessly through a hostile void. Everyone else sees air pirates sailing the Seven Skies of Saturn, the endless exciting fight scenes of Mars, the sullen ghosts of Pluto, and much more.

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, Mac, and Maria managed to rescue the Project Chimera scientists from the devious Dr. Gray, but they couldn’t stop him. Now he’s closer than ever to enacting his dreadful master plan to transform all of humanity into a monstrous new species. And, even worse, Kelly has betrayed her friends and joined forces with him. To defeat their beastly foes, Charlie and the others are going to need help. Luckily, they just saved the creators of the bracelets that give them their unbelievable powers, and they’re about to get an upgrade.

On a family trip to Paris, Greg Rich's parents disappear. They're not just missing from the city - they're missing from the century. So, Greg does what any other 14-year-old would do: He travels through time to rescue them. Greg soon finds out that his family history is tied to the legendary Three Musketeers. But when he meets them, they're his age, and they'll only live long enough to become true heroes if he can save them.

It is a time of darkness. With the end of the Clone Wars, and the destruction of the Jedi Order, the evil Emperor Palpatine rules the galaxy unopposed. When the parents of Milo and Lina Graf are abducted by agents of the evil Empire while the family is out on a mission mapping the unknown systems of Wild Space, the children must undertake a perilous journey to rescue them. This set in The Adventures in Wild Space series includes The Darkness, The Cold, and The Rescue.

In book three of this hysterical series, Klawde faces a challenger he never imagined: a dog, who has arrived on Earth to settle the intergalactic score. He's hyper, he's loyal, he's an all-around-good boy, and he's here to bring Klawde to justice. Can our ferocious feline evade the long paw of the law? Raj, on the other hand, is faced with his own out-of-town visitor who, although from Earth, may prove to be even more formidable: his grandmother. When she plans a birthday party Raj doesn't want, will he survive the embarrassment?

I'm Toph. After my father found out that I'd been competing in Earthbending tournaments, he put me under constant surveillance! So I left home. Now I'm traveling through the Earth Kingdom with Aang—he's the Avatar—and his friends Katara and Sokka, on Aang's sky bison, Appa. I'm teaching Earthbending to Aang, and man, do I have my work cut out for me! Even though we've had our differences, it's kind of nice knowing these guys will always have my back and point me in the right direction when I can't feel which way to go.