" I give her my best smile. Before the alien Armageddon happened, I was known for my smile. Not bragging too much, but I had to be careful never to smile while I drove. It had the capacity to blind oncoming traffic. But it has absolutely no effect on Ringer. She doesn't squint in its overwhelming luminescence. She doesn't even blink. "

― Rick Yancey , The 5th Wave (The 5th Wave, #1)