Nicole Richie chatted to USA Today about her new novel, fashion, Twitter and her literary role models. Here's the interview:Q: Your new novel Priceless follows your best seller The Truth About Diamonds.But it's not a sequel, right?A: No, it's not. I like to close one chapter and start fresh. Q: What's your writing routine? Early in the morning? Late at night? A: I wake up at 5:45 and the rest of