Aegis (Grey Dawn Book 1)

People driven insane by a technological wonder called the AEGIS move in packs searching for victims. Gwendolyn comes from a family of doomsday preparers, who never imagined the global crisis would be like this. After having built a new home for herself and her brothers, she takes in a mysterious runaway that may hold the answers to a worldwide disaster. Now she must risk everything to protect her family and the home that she built. Unfortunately for Gwendolyn, there might not be a way to protect everyone she cares about from a nefarious and pervasive foe that she can't even name.