5 things one might like to know about him:
1. The number of copies of his books in print is estimated between 290 million and 500 million, across 33 languages and 40 countries.
2. Before he started writing thrillers, he had been a United States Marine, a theatrical actor, and producer.
3. Ludlum’s novels were often inspired by conspiracy theories. I must confess I haven’t read any of the ones that are… The Matarese Circle, The Holcroft Covenant etc.
4. Ludlum also published books under the pseudonyms Jonathan Ryder and Michael Shepherd.
5. Ludlum used the same fixed titling pattern of The [Proper Noun] [Noun] for most of his books. Subsequent to his death, books written by other authors have carried the phrase Robert LudlumTM on their covers, thus asserting the name Robert Ludlum as a trademark.
(Information courtesy: Wikipedia)