Book of the week...
"What's the aging process for your kind?" Doc asked. "The natural life span?"
"We don't have one," I told him. "As long as we have a healthy host, we can live forever."
The Host by Stephenie Meyer
Yes, that's the same Stephenie Meyer. The author of the Twilight Saga apparently has a few more stories up her sleeve. This one is science fiction and I was surprised that I was so engaged. Based on the cover blurb, I had passed it over before. That's also how I felt about "vampire stories," though! This one leaves you pondering what makes you YOU? There's also a little food for thought about colonization and world domination...