The best-selling author, whose novel gave rise to the "Sex and the City."
franchise, is set to write two more novels.
Grand Central Publishing said Wednesday the first is about a romantic triangle and is coming out in 2012. It'll be titled "The Two Mrs. Stones."
Bushnell's novel "Sex and the City" formed the basis for the movies and HBO television series starring Sarah Jessica Parker as Carrie Bradshaw.
Her other books include "Lipstick Jungle," also made into a TV show with Brooke Shields, and "Trading Up."