Happiness interview: Natasha Vargas-Cooper. My love for all things Twilight, books and movies, both fascinates and puzzles me. Obedient to my Personal Commandment to “Be Gretchen,” I wear my passion on my sleeve, and so last year, a movie-critic friend emailed me to say, “Hey, I know you love Twilight stuff. You should check out this review.” I read the …

