Two years ago, the aliens made contact. Now Cara Sweeney is going to be sharing a bathroom with one of them. Handpicked to host the first-ever L’eihr exchange student, Cara thinks her future is set. Not only does she get a free ride to her dream college, she’ll have inside information about the mysterious L’eihrs that every journalist would kill for. Cara’s blog following is about to skyrocket.

Still, Cara isn’t sure what to think when she meets Aelyx. Humans and L’eihrs have nearly identical DNA, but cold, infuriatingly brilliant Aelyx couldn’t seem more alien. She’s certain about one thing, though: no human boy is this good-looking.

But when Cara's classmates get swept up by anti-L'eihr paranoia, Midtown High School suddenly isn't safe anymore. Threatening notes appear in Cara's locker, and a police officer has to escort her and Aelyx to class. Cara finds support in the last person she expected. She realizes that Aelyx isn’t just her only friend; she's fallen hard for him. But Aelyx has been hiding the truth about the purpose of his exchange, and its potentially deadly consequences. Soon Cara will be in for the fight of her life—not just for herself and the boy she loves, but for the future of her planet.

Amy and Elder have finally left the oppressive walls of the spaceship Godspeed behind. They're ready to start life afresh—to build a home—on Centauri-Earth, the planet that Amy has traveled 25 trillion miles across the universe to experience. But this new Earth isn't the paradise Amy had been hoping for. There are giant pterodactyl-like birds, purple flowers with mind-numbing toxins, and mysterious, unexplained ruins that hold more secrets than their stone walls first let on.

The biggest secret of all? Godspeed's former passengers aren't alone on this planet. And if they're going to stay, they'll have to fight. Amy and Elder must race to discover who—or what—else is out there if they are to have any hope of saving their struggling colony and building a future together. They will have to look inward to the very core of what makes them human on this, their most harrowing journey yet. Because if the colony collapses? Then everything they have sacrificed—friends, family, life on Earth—will have been for nothing.

I've seen him on the news. Followed the stories about what happened in Ohio. John Smith, out there, on the run. To the world, he's a mystery. But to me... he's one of us.

Nine of us came here, but sometimes I wonder if time has changed us—if we all still believe in our mission. How can I know? There are six of us left. We're hiding, blending in, avoiding contact with one another... but our Legacies are developing, and soon we'll be equipped to fight. Is John Number Four, and is his appearance the sign I've been waiting for? And what about Number Five and Six? Could one of them be the raven-haired girl with the stormy eyes from my dreams? The girl with powers that are beyond anything I could ever imagine. The girl who may be strong enough to bring the six of us together?

They caught Number One in Malaysia.
Number Two in England.
And Number Three in Kenya.
They tried to catch Number Four in Ohio—and failed.

I am Number Seven. One of six still alive.
And I'm ready to fight.