That annual number rose over the next few years; by the late 1990s, she had published over 160 novels, most of them romances, others historical novels and romantic thrillers, achieving over 200 million sales worldwide.
The author's prolific writing career saw a significant increase in her output over several years, with the number of books published reaching over 160 by the late 1990s. Her works included a majority of romances, some historical fiction and romantic thrillers, which sold over 200 million copies globally.