Who had more pseudonyms, Robert Ludlum or Clement Greenberg?
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. The number of copies of his books in print is estimated between 290 million and 500 million. They have been published in 33 languages and 40 countries. Ludlum also published books under the pseudonyms Jonathan Ryder and Michael Shepherd.
Martin H. Greenberg Martin Harry Greenberg (March 1, 1941 – June 25, 2011) was an American academic and speculative fiction anthologist. In all, he compiled 1,298 anthologies and commissioned over 8,200 original short stories. He founded Tekno Books, a packager of more than 2000 published books. As well, he was a co-founder of the Sci-Fi Channel. Greenberg was also a terrorism and Middle East expert. He was a long time friend, colleague and business partner of Isaac Asimov.