But it all becomes horrifyingly real when a murder in the past destroys the foundation of Kate’s present-day life. Suddenly, that medallion is the only thing protecting Kate from blinking out of existence.Kate learns that the 1893 killing is part of something much more sinister, and Kate’s genetic ability to time-travel makes her the only one who can stop him. Risking everything, she travels to the Chicago World’s Fair to try to prevent the killing and the chain of events that follows.Changing the timeline comes with a personal cost, however—if Kate succeeds, the boy she loves will have no memory of her existence. And regardless of her motives, does she have the right to manipulate the fate of the entire world?

    Her unique ability to jump back 40 seconds in time to correct a mistake leaves her vulnerable when her partner, who is responsible for replacing her memory of the event, gives her a false one. But Peri lives and dies on her intuition, and she begins to piece her twisted reality together as she flees her one-time secure situation at Opti and tries to find the truth with a sullen but talented psychologist named Silas who works for the very agency trying to bring the Opti corruption to light.With Howard, tech and med specialist, and Taf, gun-toting daughter of the opposing grass-roots agency, Silas and Peri try to rebuild her memory of the night she killed her partner, knowing it will put her mental stability in danger. Peri remembers, and thoughts of revenge keep her alive and moving forward as she tries to put an end to Opti, working with the very faction that wants to see her dead.

    . . by destiny or by choice.A decade ago near Chicago, five teenagers defeated the otherworldly enemy known as the Dark One, whose reign of terror brought widespread destruction and death. The seemingly un-extraordinary teens—Sloane, Matt, Ines, Albie, and Esther—had been brought together by a clandestine government agency because one of them was fated to be the “Chosen One,” prophesized to save the world. With the goal achieved, humankind celebrated the victors and began to mourn their lost loved ones. Ten years later, though the champions remain celebrities, the world has moved forward and a whole, younger generation doesn’t seem to recall the days of endless fear. But Sloane remembers. It’s impossible for her to forget when the paparazzi haunt her every step just as the Dark One still haunts her dreams. Unlike everyone else, she hasn’t moved on; she’s adrift—no direction, no goals, no purpose. On the eve of the Ten Year Celebration of Peace, a new trauma hits the Chosen: the death of one of their own. And when they gather for the funeral at the enshrined site of their triumph, they discover to their horror that the Dark One’s reign never really ended.

    The planet provides a lush but inexplicable landscape--trees offer edible, addictive fruit one day and poison the next, while the ruins of an alien race are found entwined in the roots of a strange plant. Conflicts between generations arise as they struggle to understand one another and grapple with an unknowable alien intellect.