You know about the invasion of Earth, and the Garde who will do anything to stop it. Yet there is still so much to learn. The stories in Zero Hour will help you get the answers you seek, but only the Garde and their allies can save our planet.

Entire cities disappeared in the blink of an eye, leaving nothing but dust and rubble. When an alien race came to make Earth theirs, they brought with them a weapon we had no way to fight, a universe-altering force known as thelemity. It seemed nothing could stop it - until we discovered we could wield the power, too. Five hundred years later, the Earth is locked in a grinding war of attrition. The talented few capable of bending thelemity to their will are trained in elite military academies, destined for the front lines.

The globe-trotting thief in the red fedora returns! And now, the question isn't where—but who? In the role of Carmen Sandiego, award-winning performer Kyla Garcia reveals, for the very first time, the backstory of the ever-elusive master criminal whose whereabouts captured the imaginations of children everywhere—through educational video games, animated series, and a popular PBS "gameshow" for middle schoolers in the 1990s.

In the 20th century Earth sent probes, transmissions, and welcoming messages to the stars. Unfortunately, someone noticed. The Galactics arrived with their battle fleet in 2052. Rather than being exterminated under a barrage of hell-burners, Earth joined their vast Empire. Swearing allegiance to our distant alien overlords wasn't the only requirement for survival. We also had to have something of value to trade, something that neighboring planets would pay their hard-earned credits to buy. As most of the local worlds were too civilized to have a proper army, the only valuable service Earth could provide came in the form of soldiers....

New York Times best-selling author Gordon Korman harkens back to his No More Dead Dogs days in this stand-alone that takes a tone more serious than you've ever heard from him before. A boy who's been a bully and hanging out with the wrong friends gets a new start after a memory-loss-inducing accident. But can someone really change who he is, or will the old him merely come back over time?

Sammy, a 14-year-old fugitive, accidentally discovers he has the powers of a Psion. Plucked off the streets, he is thrust into the rigorously disciplined environment of Psion Beta headquarters. As a new Beta, Sammy must hone his newfound abilities using holographic fighting simulations, stealth training missions, and complex war games. His fellow trainees are other kids competing to prove their worth so they can graduate and contribute to the war effort.

Kris Longknife is a daughter of privilege, born to money and power. Her father is the prime minister of her home planet, her mother the consummate politician's wife. She's been raised only to be beautiful and marry well. But the heritage of the military Longknifes courses through Kris' blood - and, against her parents' objections, she enlists in the Marines.

The Earth had four fleets to fight the invading enemy. The first fleet valiantly protected earth, but it wasn’t enough. Three fleets would arrive soon and end the threat...but they never came through the wormhole. One ship escaped the massacre, fleeing deep into space while the rest of Earth’s defenses were destroyed. Only the barrier around the planet keeps the enemy from finishing what they started.

Kurt is a talented but emotionally damaged football player. Danny is a rising star on the gymnastics team, an outsider in a high school where the football team rules. But the two form an unlikely friendship, and when one member of the gym team is viciously assaulted by the quarterback and his cronies, Kurt rises to his defense and challenges the entrenched stereotypes of high-school sports. This is that rare book that authentically captures the voices, fierce loyalties, and harsh justice of teenage boys.

Life is boring when you live in the real world instead of starring in your own book series. Owen knows that better than anyone, what with the real world's homework and chores. But everything changes the day Owen sees the impossible happen - his classmate Bethany climbs out of a book in the library. It turns out Bethany's half fictional and has been searching every book she can find for her missing father, a fictional character.

Imagine a school in the year 2074 where students don't read history, but watch it happen around them; where running in gym class isn't around a track, but up a virtual mountain; and where learning about animals means becoming one through an avatar. Welcome to Cragbridge Hall, the most advanced and prestigious school in the world. Twins Abby and Derick Cragbridge are excited as new students to use their famed grandfather's inventions that make Cragbridge Hall so incredible.

In middle school, words aren't just words. They can be weapons. They can be gifts. The right words can win you friends or make you enemies. They can come back to haunt you. Sometimes they can change things forever. When cell phones are banned at Branton Middle School, Frost and his friends Deedee, Wolf, and Bench come up with a new way to communicate: leaving sticky notes for each other all around the school. It catches on, and soon all the kids in school are leaving notes - though for every kind and friendly one, there is a cutting and cruel one as well.

Funny girl Harley Quinn loves fighting crime with her classmates like Wonder Woman, Batgirl, and Supergirl, but she always does it her with own madcap style - and a big mallet! It's no surprise that Harley can't resist getting involved in a dance competition and organizing an outrageous battle of the bands. But when a high-tech carnival comes to town, Harley knows that things aren't what they seem and that only she can get to the bottom of the mystery - and deliver a great punch line while doing it!

Cole Matthews used to be a violent kid, but a year in exile on a remote Alaskan island has a way of changing your perspective. After being mauled by a Spirit Bear, Cole started to heal. He even invited his victim, Peter Driscal, to join him on the island and they became friends. But now their time in exile is over, and Cole and Peter are heading back to the one place they're not sure they can handle: high school. Gangs and violence haunt the hallways, and Peter's limp and speech impediment make him a natural target.

Matt Thorsen knows every Norse myth, saga, and god as if it was family history - because it is family history. Most people in the modern-day town of Blackwell, South Dakota, in fact, are direct descendants of either Thor or Loki, including Matt's classmates Fen and Laurie. When the rune readers reveal that the monsters of Ragnarok are coming and kids will stand in for the gods in the final battle, Matt can hardly believe it. Matt and his friends must race to put together an unstoppable team to prevent the end of the world.