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The five Kingdom Keepers and their core friends have uncovered a startling truth: Maleficent and the Overtakers (Disney villains) are plotting a catastrophic event that could have repercussions far beyond the world of Disney. Aboard the Disney Cruise Line's inaugural passage through the new Panama Canal, the Keepers and their holograms uncover a puzzle hidden within the pages of a stolen journal. The point of that puzzle will reveal itself in the caves of Aruba, the zip lines of Costa Rica, and the jungles of Mexico.

Jack’s friends make a startling discovery: They may not be the last kids on Earth, after all. This is great news for everyone...except Jack. Once they’ve found other humans, his friends won’t stick around for long! Jack’s only hope for keeping things the way they are is to prove that everything here is perfect, life is crazy fun, and nothing else could be any better. After all, they live in a mind-clobberingly cool tree fort, speed through town playing real-life Mario Kart, have a crew of monster buddies, and battle zombies on the regular. That's as good as it gets!

Don Harvey is a citizen of the Interplanetary Federation - yet no single planet can claim him as its own. His mother was born on Venus and his father on Earth, and Don himself was born on a spaceship in trajectory between planets. When his parents abruptly summon him away from school on Earth to join them on Mars, he has no idea he's about to be plunged into deadly interplanetary intrigue. But the ship Don is traveling on is unexpectedly diverted to Venus, where the colony has launched a revolution against Earth's control.

As the mighty alien fleet from the very latest computer game thunders across the computer screen, Johnny prepares to blow them into the usual million pieces. And they send him a message. We surrender. They're not supposed to do that! They're supposed to die. And computer joysticks don't have "Don't Fire" buttons...It's hard enough trying to save Mankind from the Galactic Hordes. It's even harder trying to save the Galactic Hordes from Mankind. But it's only a game, isn't it. Isn't it?

In this third and final adventure in the Above World series, Aluna and her friends finally face their most terrifying enemy, Karl Strand. Aluna and Hoku, Kampii from the City of Shifting Tides, and their friends, Equian Dash and winged Aviar Calli, are determined to stop a war. The maniacal ex-scientist Karl Strand is planning to conquer the world with his enormous army of tech-enhanced soldiers . . . unless the four friends can get to Strand first. Aluna’s plan is dangerous: pose as Upgraders and infiltrate the army.

One hundred and fifty years ago, the first dinosaurs were cloned. Soon after, they replaced humans at the top of the food chain. The only way to survive was to move into underground compounds.... Five years ago, Sky Mundy's father vanished from North Compound without a trace. Now she has just stumbled on a clue that not only suggests his disappearance is just the tip of an even larger mystery but also points directly to the surface. To find her dad - and possibly even save the world - Sky and her best friend, Shawn, must break out of their underground home and venture topside.

The desert is no place for ocean-dwelling Kampii like Aluna and Hoku, especially now that Aluna has secretly started growing her tail. But the maniacal Karl Strand is out to conquer the Above World, and the horselike Equians are next on his list. Aluna, Hoku, and their friends - winged Calli and Equian exile Dash - race to the desert city of Mirage, intent on warning the Equians and forming an alliance. Unfortunately, Strand’s clone, Scorch, has gotten there first. Now the Equian leader has vowed to take all his people to war as part of Strand’s army.

Jack and Annie are whisked back to the Civil War, where they meet Clara Barton and save the life of their very own great-great-great-grand-father.

Jack and Annie are whisked all the way back to the Ice Age in this compelling Magic Tree House time-travel adventure, in which they meet woolly mammoths, cave people...and fierce sabertooth tigers!

Thirteen-year-old Aluna has lived her entire life under the ocean, just like all of the Coral Kampii in the City of Shifting Tides. But after remaining hidden from the Above World for centuries, her colony is in trouble, its survival in doubt :  the tech that allows the Kampii to breathe underwater is beginning to fail, and many Kampii have already died. Yet the colony’s elders, including Aluna’s father, are unwilling to venture to the dry and dangerous Above World to search for answers. So it’s up to Aluna and her friend Hoku to face the terrors of land to find a solution.

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.

First Aleks' mom loses the car keys, which he finds in the fridge, and then Christoffer forgets how to get to his own house. On the surface it doesn't seem so bad, but events become more disturbing as the day progresses. Something strange is happening in Norway, and Aleks Mickelsen is the only one who can stop it. Too bad for us, the last thing he wants is another adventure.

Noah, his sister Megan, and their best friends, Richie and Ella, live next door to the zoo. Megan is the first to notice the puzzling behavior of some of the animals. One day Megan disappears, and her brother and their friends realize it’s up to them to find her. Their only choice is to follow a series of clues and sneak into the zoo. But once inside, will they discover there’s much more to the Clarksville City Zoo than they could ever have guessed?

In New York Times best-selling author Dan Gutman's all-new series, which blends fascinating real history with an action-packed and hilarious adventure, four very different kids are picked by a mysterious billionaire to travel through time and photograph some of history's most important events. This time the four friends are headed to 1863 to catch Abraham Lincoln delivering his famous Gettysburg Address.

Supervillains do not merely play hooky. True, coming back to school after a month spent fighting - and defeating - adult superheroes is a bit of a comedown for the Inscrutable Machine. When offered the chance to skip school in the most dramatic way possible, Penelope Akk can't resist. With the help of a giant spider and mysterious red goo, she builds a spaceship and flies to Jupiter. Penny and her friends find all this and more on Jupiter's moons, but what they don't find are any heroes to save the day.

It's summertime for supervillains! Or maybe not, because for Penelope Akk, there is still one foe she has yet to defeat: her own reputation as Bad Penny. It's been a fun ride: fighting adult heroes, going to space, and inspiring the rest of her school to open up about their own powers. Sooner or later, that ride has to end, and with school out of the way Penny is hatching a mad scheme to end it on her own terms. Will that go smoothly? Of course not. Penny's left too many unsolved problems behind her already, like ghosts, crazy friends, and angry little girls from Jupiter.

What would middle school be like if half your classmates had super powers? It's time for Penny Akk to find out. Her latest (failed) attempt to become a superhero has inspired the rest of the kids in her school to reveal their own powers. Now, all of her relationships are changing. She has a not-at-all-secret admirer, who wants to be Penny's partner almost as much as she wants to be Penny's rival. The meanest girl in school has gained super powers and lost her mind. Can Penny help her find a better one?

Penelope Akk wants to be a superhero. She's got superhero parents. She's got the ultimate mad science power, filling her life with crazy gadgets that even she doesn't understand. She has two superpowered best friends. In middle school the line between good and evil looks clear. In real life nothing is that clear. All it takes is one hero's sidekick picking a fight, and Penny and her friends are labeled supervillains. In the process Penny learns a hard lesson about villainy: She's good at it.

Chipper is a very special dog. As part of a top-secret multimillion-dollar experiment to create the ultimate canine spy technology, Chipper's whole life has been spent within the walls of a secret organization known only as The Institute. Chipper is supposed to be more machine than mutt, but something's wrong, and The Institute knows it. He's about to be terminated. Across the state, 12-year-old orphan Jeff Conway is working all hours at his aunt Flo's lakeside cabin business. He misses his parents, his old life, and the dog he had to leave behind.

This story begins after King Uhla'ar kidnapped Aly and dragged her back through a rift in time. A giant, merciless behemoth guards the opening, and so Jack McKinley and his friends realize that rescuing Aly will be harder than they thought. Their only hope is to rush to the last of the Ancient Wonders and find the rest of the lost Loculi.