With its gripping companion novel, Replica, this remarkable novel by the author of Before I Fall and the Delirium trilogy asks how to be a human being, in a world where humanity cannot be taken for granted. In the world outside of the Haven Institute, the replicas Lyra and Caelum are finding it hard to be human—and Lyra, infected at Haven with a terrible disease, finds her symptoms are growing worse. But in trying to find a cure, they uncover a shocking connection to their past, even as their future seems in danger of collapsing. Gemma just wants to go back to her normal life after Haven. But soon, she learns that her powerful father has other plans for the replicas—unless she and her boyfriend Pete can stop him.  Bestselling author Lauren Oliver brings the Replica duology to a shocking close in Ringer. Like Gemma and Lyra, you won’t be able to leave the world of Haven behind after you’ve turned the last page. Two girls, one a secret replica, the other a desperate fugitive. Two stories hurtling toward one shocking truth. Dual Perspective, Two Ways to Read: Follow Gemma’s story, then Lyra’s, or alternate between them chapter by chapter for a unique reading experience that reveals the full conspiracy. - What It Means to Be Human: As Lyra’s mysterious illness worsens and Gemma’s “normal” life unravels, both must confront the secrets of their creation and fight for their right to exist. - High-Stakes Survival: From a secret holding facility to the back roads of America, this gripping speculative fiction novel is a desperate scramble for freedom. - Secrets and Betrayal: Gemma thought she could trust her father to protect the replicas. She was wrong—and now she and her boyfriend Pete are the only ones who can stop his deadly plan. Praise for REPLICA: “Electric, heartbreaking, pulse-pounding, and timely. Replica is a riveting two-for-one. Two complex heroines, two puzzling mysteries, two weaving adventures, all in one astounding novel.” - Victoria Aveyard, #1 New York Times bestselling author of Red Queen Praise for REPLICA: “A searing pair of intertwined stories about the line between science and humanity, told with Oliver’s signature grace, uniqueness, and precision. It’s a new story every way you turn it - but always gorgeous, always haunting.” - Marie Lu, #1 New York Times best-selling author of The Young Elites and Legend Praise for REPLICA: “A reading experience not to be missed―or forgotten.” - Kirkus Reviews (starred review) Praise for REPLICA: “The unique format [of Replica] will draw readers in, and strong writing will keep them hooked. Oliver’s dystopian Delirium trilogy achieved bestseller status, and she’s been gaining steam ever since. Teens will line up for this one.” - Booklist Praise for REPLICA: “With Oliver’s clever crafting, teens will be clamoring for the next book in the series.” - The Horn Book “The mirrored structure and flip book format work especially well here, as the two narratives connect but rely less on reimagining the same scenes, heightening the emotional resonance and providing double the suspense. This sequel is more exciting and a great deal steamier, with authentically bittersweet resolutions.” - Booklist “Like Replica, this entry is a flip book and can be read in either order or by alternating between Gemma’s and Lyra’s stories—yet the narratives are intertwined, making for an interesting reading experience for teens.... Bringing this duology to a close, this sequel will delight fans of the previous entry.” - School Library Journal “The third-person narration plunges along at a positively addicting pace. Speculative fiction at its core, Oliver’s novel is also a reflection on the nature of humanity as explored through the dualities of life/death, autonomy/ownership, truth/lies, and good/evil.” - Kirkus Reviews Two girls, two sides—the story continues. . . .  Gemma After discovering the uncomfortable truth about her connection to the Haven Institute, Gemma struggles to return to her normal life. But when she learns that her controlling and powerful father has new plans for Lyra and Caelum, Gemma and her boyfriend, Pete, leave in the middle of the night to warn them of the danger they face. When an accident strands them on the side of the road, they are mistaken for the escaped replicas and seized by strangers hired to capture them. Driven to a teeming facility housed in an abandoned airport, Gemma comes face-to-face with the hundreds of replicas who survived the explosion on Spruce Island. The Haven Institute wasn’t destroyed after all, and now Gemma is the one behind the walls. Lyra In the world outside the Haven Institute, Lyra and Caelum are finding it hard to be human. Though free from the guards, doctors, fences, and probing experiments, they feel more trapped than ever. Lyra, infected at Haven with a terrible disease, finds her symptoms are growing worse. Caelum regrets their escape. And neither of them knows where they belong or who they can trust. Even Ge