It's hard to forget your past when you're staring at it. That's the conclusion Emma Watkins arrives at when she returns to Hayden, Maine-population 2,253; now 2,254-for the first time in nine years. When she sees him for the first time in nine years. When that word leaves his mouth. Buttercup. A pretty nickname in an ugly tone. A term of endearment time twisted into an insult. A taunt that nothing...