50. Nora Roberts
$390 Million Age: 67 Residence: boonsboro, Maryland
since 1981, the prolific romance author has published more than 215 novels, including 4 in the last 12 months. Her most recent novel, Shelter in Place, a topical thriller about survivors of a mass shooting, sold more than 100,000 copies in a week. Roberts owns a bookstore, boutique B&B, gift shop, fitness center and restaurant in the small town where she lives.