When Sky Patel-Baum is sent to live with her mysterious uncle, she didn’t imagine she’d end up here: Area 51. A top-secret military base with a bajillion rules and so classified not even the president knows its secrets. Also, it turns out the place is full of aliens. Lots and lots of aliens. But they prefer to be called Break Throughs, thank you very much.

When robot Roz opens her eyes for the first time, she discovers that she is alone on a remote, wild island. Why is she there? Where did she come from? And, most important, how will she survive in her harsh surroundings? Roz's only hope is to learn from the island's hostile animal inhabitants. When she tries to care for an orphaned gosling, the other animals finally decide to help, and the island starts to feel like home. Until one day, the robot's mysterious past comes back to haunt her....

Something terrible is happening in the skies! Rats are eating the MOON! There’s only ONE hero for the job, a bold and fearsome beast bioengineered in a secret lab to be the moon’s savior and Earth’s last hope! And that hero is . . . a cat. A cat who will be blasted into space!

Liam Chapman cannot believe his good fortune. He just bought a real, working time machine at a garage sale for $3. Sure, it’s labeled “World’s Worst Time Machine,” but how bad could it be? The time machine, as it turns out, is so much worse than Liam could have imagined. First, it summons Thomas Edison, but not that Thomas Edison. This Thomas Edison is a 10-year-old aspiring gangster from 1933 who demands to be called “Tommy Twinkles” and is also very interested in robbing a bank of the future.

Adam Rubin is back with this companion to The Ice Cream Machine, inviting you into six thrilling new worlds filled with daring and danger, mystery and mayhem—not to mention explosions! In a swanky New York City hotel, a reclusive guest appears to have spontaneously combusted. On a school field trip to a human anatomy museum in space, two kids try to pull off the greatest prank in history.

The cat that Olive rescues from a flood has a secret: He's not really a cat at all, but an alien who crashed to Earth on a beam of light. The cat, whom Olive names Leonard, was prepared to visit the planet as a human - but something went wrong. Now Leonard may never know what it's like to hold an umbrella, go bowling, or host a dinner party. (And his human jokes still need some work: Knock, knock. Who's there? Just Leonard. It is me.)

Link, Michael, and Dana live in a quiet town. But it's woken up very quickly when someone sneaks into school and vandalizes it with a swastika. Nobody can believe it. How could such a symbol of hate end up in the middle of their school? Who would do such a thing? Because Michael was the first person to see it, he's the first suspect. Because Link is one of the most popular guys in school, everyone's looking to him to figure it out. And because Dana's the only Jewish girl in the whole town, everyone's treating her more like an outsider than ever.

If Austin picked a color to describe his life, it would be tumbleweed brown. Austin doesn't like standing out. He’s always the new kid, and there's no hiding his size. Plus, Austin has a secret: He struggles to read. Then Austin meets Bertie, who is razzmatazz. Everything about Bertie is bursting! But the best part of his newest school is the Safety Squad, with their laser lemon vests.

Tim is just a peasant, but he dreams big. He wants more out of life than to grow up to be a woodsman like his father. Unfortunately, the only route to success in the kingdom of Wyld is to be born a prince. Still, Tim is determined. He is brave and clever and always tries to do the right thing—even though he rarely gets the credit for it.

Abel loves dragons, but after a disastrous showing in his dragon rider exam, he feels he's destined never to pilot one. That's why when an opportunity presents itself - even though it's tied to one of Drakopolis' mob-like kins - Abel leaps at the opportunity. But soon he's swept into a game of danger and cruelty - cruelty toward people, and especially toward dragons. With his own family's loyalties split between the kins, soon Abel will need to choose a side.

Regan Fitz and Elliot Mason have been enemies since they started training to become Glitchers - people who travel through time to preserve important historical events. But everything changes when they find a letter from Regan’s future self, warning them about an impending disaster that threatens them and everyone they know.

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.

Harvey Hill just wants other kids to think he’s normal. So he’s happy to start fresh as the newest kid at Strangeville Middle School. Except Strangeville is anything but normal. Something sinister swims in the drinking fountain, the cafeteria could swallow you whole, and a giant rat named Cuddles is on the loose. And don't even get the vice principal started on the third-floor supply closet. In fact, don't even think about it. What supply closet?

Ever since Stella was a puppy, she was trained to use her powerful beagle nose to sniff out chemicals used in explosives and warn her human handler in order to keep people safe. But during a routine security inspection, Stella is distracted and misses the scent of an explosive chemical. The sound of the blast is loud and scary. Stella survives, but her handler is gone. Stella blames herself, certain she’s a bad dog. Scared of loud noises, especially thunder and fireworks, Stella struggles with her anxiety and must be retired from being a service animal.

Mia Tang has a lot of secrets. Number one: She lives in a motel, not a big house. Every day, while her immigrant parents clean the rooms, 10-year-old Mia manages the front desk of the Calivista Motel and tends to its guests. Number two: Her parents hide immigrants. And if the mean motel owner, Mr. Yao, finds out they've been letting them stay in the empty rooms for free, the Tangs will be doomed. Number three: She wants to be a writer. But how can she when her mom thinks she should stick to math because English is not her first language?