Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Very little light at the end of this tunnel

You'll stick with these stories the same way you'd stick with a gruesome late night news piece about some local horror (and you feel about equally uplifted when you're through reading). A much better read by Proulx, with some light shot through the darkness, is her story The Shipping News. Now there's a novel worth your time.