Who has more books published, Dan Masterson or Robert Ludlum?
Robert Ludlum: Robert Ludlum (May 25, 1927 – March 12, 2001) was an American author of 27 thriller novels, best known as the creator of Jason Bourne from the original "The Bourne Trilogy" series. Robert Ludlum:  The number of copies of his books in print is estimated between 290 million and 500 million.
i don't know