You know we have been betrayed. You must discover why. They have put a plan in motion. They have infiltrated your government. They have already turned some of you. They will do whatever it takes to have your planet. The battle lines have been drawn. Whose side are you on?

It has been over a year since the invasion of Earth was thwarted in Pittacus Lore's United as One. But in order to win, our alien allies known as the Garde unleashed their Loric energy that spread throughout the globe. Now human teenagers have begun to develop incredible powers of their own, known as Legacies. To help these incredible and potentially dangerous individuals - and put the world at ease - the Garde have created an academy where they can train this new generation to control their powers.

After the first wave, only darkness remains. After the second, only the lucky escape. And after the third, only the unlucky survive. After the fourth wave, only one rule applies: Trust no one. Now, it's the dawn of the fifth wave, and on a lonely stretch of highway, Cassie runs from Them. The beings who only look human, who roam the countryside killing anyone they see. Who have scattered Earth's last survivors. To stay alone is to stay alive, Cassie believes, until she meets Evan Walker.

Pittacus Lore finished telling the story of the Lorien Nine in the New York Times best-selling I Am Number Four and Lorien Legacies Reborn series. Now he’s back to recount an all-new adventure rooted in the real mysteries surrounding Roswell, New Mexico, that will enthrall fans of Brandon Sanderson, Jay Kristoff, and Amie Kaufman.

Syd Chambers grew up on Earth with his human mother and barely remembers his alien father from Denza, who left on a mission when Syd was very young. After leaving Earth, Syd learned the truth of his father’s disappearance on the planet Ashfall—his father had died protecting a devastating secret about the history between humans and Denzans.