Roberta Helmer (July 19, 1950 – May 21, 2018), under her pseudonym Christina Skye, was the best-selling American author of more than thirty-two novels in a variety of genres: romantic suspense, paranormal romance, as well as contemporary and historical romances. Many of her books have appeared on the USAToday and New York Times bestseller lists and the Publishers Weekly bestseller list. Her books have been translated into ten languages. Under her own name Helmer has written five non-fiction books about the classical Chinese puppet theater and traditional Chinese folk arts.