 Marchetto is a cartoonist fashionista for Glamour and the New Yorker. Her autobiography "Vixen," which has been generating buzz ahead of its release by Knopf on Tuesday, describes how she fell in love with a celebrity restaurateur and was planning their wedding when she was diagnosed with breast cancer and realized that she had let her health insurance lapse. Her friends -- stylists, gossip columnists, designers -- rallied around her as she wore killer shoes to chemo sessions and strove to get married on time.