When Mason Stark's classmates start to disappear mysteriously and he discovers an ancient, powerful enemy, he calls on his friends--both human and Tremist--to fight as he once again must act as an intergalactic hero.

Cara and Aelyx maintain their extremely long-distance relationship, with Cara continuing as an exchange student and becoming human representative to a panel preparing for a human colony on L'eihr and Aelyx working on a campaign to improve human-L'eihr relations, which soon makes him a target of extremists.

Leaving Earth behind is hard, but what's ahead, on Europa, could be worse. The International Space Training Camp continues to hide the truth about what happened to the last group of astronauts who attempted a similar colonization but failed mysteriously. Naomi is determined to find out if there is alien life on Europa before she and her crew get there. Leo, back on Earth, has been working with renegade scientist Dr. Greta Wagner, who promises to fly...

In the aftermath of a series of plane crashes caused by birds, seventeen-year-old Reese and her debate-team partner, David, receive medical treatment at a secret government facility and become tangled in a conspiracy that is, according to Reese's friend, Julian, connected with aliens and UFOs.

Eleven-year-old Lemon Peabody is certain that aliens visited her grandfather thirty years ago, but she is running out of time to prove it before Grandpa Walt's memory fades.

The Human Garde Academy was created in the aftermath of an alien invasion of Earth. It was meant to provide a safe haven for teens across the globe who were suddenly developing incredible powers known as Legacies. Taylor Cook was one of the newest students and had no idea if she'd ever fit in. But when she was mysteriously abducted, her friends broke every rule in the book to save her. In the process, they uncovered a secret organization that was...

A story complemented by fun scientific facts and a do-it-yourself experiment finds young Zack working to protect his tiny alien friend, Amp, while struggling through a science-fair project and preventing an alien invasion.

Many surprises await twelve-year-old Edwy Watanaboneset when the Freds return him to Cursed Town, including that he has siblings in Refuge City who he will join in boarding school.

"Lucky thinks he's an ordinary Human boy. But one night, he dreams that the stars are singing - and wakes to find an uncontrollable power rising inside him. Now he's on the run, racing through space, searching for answers. In a galaxy at war, where Humans and Aliens are deadly enemies, the only people who can help him are an Alien starship crew - and an Alien warrior girl, with neon needles in her hair. Together, they must find a way to save the galaxy....

When scientists discover a rare and mysterious mineral buried in the Earth's crust, it's not long before aliens show up to our little corner of the galaxy offering a promise of protection, some fabulous new technology, and entry into their intergalactic coalition in exchange for this precious resource. Other alien forces are willing to start a war over it. Leo's mother was killed in one attack, and soon after, his father, a Coalition scientist, decides...