City of Ghosts by Victoria Schwab
From #1 New York Times bestselling author Victoria Schwab comes a sweeping, spooky, evocative adventure, perfect for fans of Stranger Things.
Ever since Cass almost drowned (okay, she did drown, but she doesn’t like to think about it), she can pull back the Veil that separates the living from the dead . . . and enter the world of spirits. Her best friend is even a ghost.