Sounds of Silence: "In the After" by Demitria Lunetta

Amy is a normal, happy teen. She might sometimes gripe about her parents, her mother, a government workaholic, and her dad, who's into green living. She enjoys school and her friends and then, one Saturday afternoon... the world as she knew it had ended. What was Before is over. She has to learn to live in the After. And, In the After, by Demitria Lunetta, is a wild, different, post apocalyptic look at life on earth, an earth taken over by fast, make that super fast, ravenous alien monsters, with incredible hearing that can find you and rip you apart if you just breathe too loudly.
That Saturday, Amy was home alone, while her parents were out. They are probably dead, now. Like everyone else she knows. It started with the TV broadcasts ... aliens had landed and were destroying anyone and anything alive. Then TV was gone, so was radio, after a while. She hunkers down with her books and what food they have on hand. Three weeks pass. She is safe because her mother had to protect the government secrets she brought home and had installed an electric fence which keeps Them away. She also had a gun, which her father had made sure she knew how to use, despite his reservations about having it in the house.
Needing to restock her provisions, Amy makes her way beyond the protection of the electric fence after dark. The creatures seem to disappear at night.  She learns, on that first trip, what to do and what not to. Like wearing shoes. Even the sound of a sneaker on pavement can draw Their attention.
She begins to make trips to a supermarket to restock her shelves. It is on one of these trips that she finds Baby, a little girl, maybe 3 or 4 years old who has managed to survive, despite being wounded.  At first, Amy isn't sure what to do with her, and thinks if the little girl makes a sound, she'll throw her to the wolves... or, in this case, to THEM.  She decides to take her home with her and Amy's connection to Baby becomes the heart of this gripping, disturbing look at a future where you do what you can to survive and don't know quite who to trust anymore.
I loved Amy and Baby! They are wonderfully realized characters and you fear for them in this frightening world. I won't give away any more of the plot because it is a terrific, unputdownable , surprising and twisty story and if you enjoy post-apocalyptic fiction (or any fiction!), then don't miss this one!

Simon and Garfunkle's "Sounds of Silence" from Ms.Lunetta's "In the After" Playlist...and the miracle of Youtube