Hereafter by Tara Hudson

"Can there truly be love after death?
Drifting in the dark waters of a mysterious river, the only thing Amelia knows for sure is that she's dead. With no memories of her past life, she's trapped alone in a nightmarish existence. But everything changes when she tries to rescue a boy from drowning in the river. Because even though she can't do anything to help, Amelia somehow wills him to survive. And when he wakes up, Joshua can see her.Together, Joshua and Amelia begin to uncover the strange circumstances of her death, and the secrets of the dark river that has held her captive. But even as they grow ever closer, there are those in both worlds—the living and the dead—determined to tear them apart. . . ."

-Enjoy!
Bookworm