Till Human Voices Wake Us,

"Seventeen-year-old Cia lived in a house of secrets until she was five, when her father literally burned it all down. The price of his clandestine operation? Cia's entire family, and her leg. So, when her best friend Alice says she has a secret too, Cia wants nothing to do with it--even if it could shed light on her family's dark past. But Alice doesn't let go so easily, especially when her search for answers might help find Noah, the boy who broke her heart before going missing two months ago. But then the police find Alice's body floating in the quarry. Now Cia would give anything to know Alice's secrets. Because Alice would never have jumped, no matter what the cops think. Desperate to figure out what happened to her friend, Cia picks up the threads of Alice's investigation, plunging deep into a shadow world of augmented reality. As she untangles one web of lies after another, Cia finds herself pursued by an enemy that will pay any price to keep their secrets buried. But the girl who already lost everything isn't about to back down now. Her only chance to avenge Alice lies in exposing an underground society preying on those they think no one will miss--but danger lies closer to home than she imagined."-- Publisher's website