I squeeze into the middle airplane seat, politely apologizing to the person who got up from his aisle seat for me to get in. As I set my backpack down, trying to decide whether to grab my noise-canceling headphones, I greet the older woman in the window seat next to me. I opt for my book, kicking my backpack under the seat in front of me. Seat belt buckled, I settle in for my final flight of the day, hoping to making a dent in the chapter that awaits me.