Although we had a week of sunshine and bizarrely warm weather here in Northern California last week, it's getting cold again. And when it's cold, what sounds better than a bed that's been pre-warmed by an electric blanket? Do you use one? It's an energy-efficient way to cut down on your gas heating bill. Also, we're talking about green luxury, used books, cheap eco-friendly hand soap, and mattress alternatives. Get all the links after the jump. It seems wrong, but eco-friendly hand soap can be expensive. Here are three brands that come in under $5. Let's face it: Mattresses, no matter how "eco-friendly" they might seem, just aren't that great for the earth. So, a reader asks for an alternative. Many of us are addicted to books and, just as with most products, it's always greener to get 'em used. What used book store do you love? Is green luxury an oxymoron? Or should we be more inclusive in our definition of what's green?