My next zombie read.
Ashes by Ilsa J. Bick, 2011
An electromagnetic pulse flashes across the sky, destroying every electronic device, wiping out every computerized system, and killing billions. Now Alex is left without her parents. And she wants to figure out what happened. She joins with other survivors to move forward, but for them, it’s now a question of who can be trusted and who is no longer human. Also available as a book on CD and an eBook.