The Question and Answer section for If I Stay is a great resource to ask questions, find answers, and discuss the novel.
Mia finds her grandparents because she hears them "chattering". Grandpa is peeling the top off of his styrofoam coffee cup, and Gran simply chatters away like she is speaking to the air.
Check this out:
The setting is a family home in a town in Oregon just outside Portland. Less than an inch of snow covers the ground and school has been cancelled for the day.