From Lauren Oliver, New York Times bestselling author of Before I Fall and the Delirium trilogy, comes an epic, masterful young adult sci-fi novel that explores issues of individuality, identity, and humanity.

Lyra’s story begins in the Haven Institute, a building tucked away on a private island off the coast of Florida that from a distance looks serene and even beautiful. But up close the locked doors, military guards, and biohazard suits tell a different story. In truth, Haven is a clandestine research facility focused on human cloning, where thousands of replicas, or human models, are born, raised, and observed. When a surprise attack is launched on Haven, two of its young experimental subjects—Lyra, or 24, and the boy known only as 72—manage to escape.

Gemma has been in and out of hospitals for as long as she can remember. A lonely teen, her life is circumscribed by home, school, and her best friend, April. But after she is nearly abducted by a stranger claiming to know her, Gemma starts to investigate her family’s past and discovers her father’s mysterious connection to the secretive Haven research facility. Hungry for answers, she travels to Florida, only to stumble upon two replicas and a completely new set of questions in this twisting young adult mystery.

While the stories of Lyra and Gemma mirror each other, each contains breathtaking revelations critically important to the other story. Turn the book one way and read Lyra’s story; turn the book over and upside down and read Gemma’s story. The two distinct parts of this novel combine to produce an unforgettable experience for its two young heroines—and its reader.

With their paths set on a collision course, what will they uncover about Haven, and themselves?

• Dual Perspective: Read Lyra’s story, then flip the book to read Gemma’s. The two narratives intertwine, each holding secrets that unlock the other in this one-of-a-kind reading experience.
• Conspiracy Thriller: As Gemma digs into her family’s past, she uncovers her father’s shocking connection to the clandestine Haven Institute, pulling her into a web of secrets and danger.
• Dystopian Novel: Follow Lyra and a boy known only as 72 as they escape a secret island facility where human ‘replicas’ are born, raised, and observed—and disposable.
• Identity and Humanity: A gripping exploration of what it means to be human. Are we defined by our origins or by our choices?