Their most astonishing invention, called the Firebird, allows users to jump into multiple universes—and promises to revolutionize science forever. But then Marguerite's father is murdered, and the killer—her parent's handsome, enigmatic assistant Paul— escapes into another dimension before the law can touch him.Marguerite refuses to let the man who destroyed her family go free. So she races after Paul through different universes, always leaping into another version of herself. But she also meets alternate versions of the people she knows—including Paul, whose life entangles with hers in increasingly familiar ways. Before long she begins to question Paul's guilt—as well as her own heart. And soon she discovers the truth behind her father's death is far more sinister than she expected.

    Short flashback that occurs between "The Scorch Trials" and "The Death Cure."

    Madeleine and her mother have run away from their former life, under mysterious circumstances, and settled in a rainy corner of Cambridge (in our world).Elliot, on the other hand, is in search of his father, who disappeared on the night his uncle was found dead. The talk in the town of Bonfire (in the Kingdom of Cello) is that Elliot's dad may have killed his brother and run away with the Physics teacher. But Elliot refuses to believe it. And he is determined to find both his dad and the truth.As Madeleine and Elliot move closer to unraveling their mysteries, they begin to exchange messages across worlds -- through an accidental gap that hasn't appeared in centuries. But even greater mysteries are unfolding on both sides of the gap: dangerous weather phenomena called "color storms;" a strange fascination with Isaac Newton; the myth of the "Butterfly Child," whose appearance could end the droughts of Cello; and some unexpected kisses...

    Elias is a soldier. Neither is free.   Under the Martial Empire, defiance is met with death. Those who do not vow their blood and bodies to the Emperor risk the execution of their loved ones and the destruction of all they hold dear.   It is in this brutal world, inspired by ancient Rome, that Laia lives with her grandparents and older brother. The family ekes out an existence in the Empire’s impoverished backstreets. They do not challenge the Empire. They’ve seen what happens to those who do.   But when Laia’s brother is arrested for treason, Laia is forced to make a decision. In exchange for help from rebels who promise to rescue her brother, she will risk her life to spy for them from within the Empire’s greatest military academy.   There, Laia meets Elias, the school’s finest soldier—and secretly, its most unwilling. Elias wants only to be free of the tyranny he’s being trained to enforce. He and Laia will soon realize that their destinies are intertwined—and that their choices will change the fate of the Empire itself.From the Hardcover edition.