Orson Scott Card 
Visitors 

From Orson Scott Card, the internationally bestselling author of Enders Game, comes the riveting finale to the story of Rigg, a teenager who possesses a special power that allows him to see the paths of peoples pasts.In Pathfinder, Rigg joined forces with another teen with special talents on a quest to find Riggs sister and discover the true significance of their powers. Then Riggs story continued in Ruins as he was tasked to decipher the paths of the past before the arrival of a destructive force with deadly intentions. Now, in Visitors, Riggs journey comes to an epic and explosive conclusion as everything that has been building up finally comes to pass, and Rigg is forced to put his powers to the ultimate test in order to save his world and end the war once and for all.