by Robert Ludlum · Umbriel · tapa blanda · ISBN 9788489367623
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«El protocolo Sigma» is a spy thriller by Robert Ludlum, published by Umbriel in paperback (672 pages, in Spanish).
Ben Hartman arrives in Zurich and a former university colleague points a gun at him. Agent Anna Navarro, from the Justice Department, links several deaths to the Sigma key and to World War II, although her superiors remove her from the case. The plot connects Nazi gold with a global economic conspiracy.
Spanish edition published in 2009; the cover indicates 2nd edition. Original title: The Sigma Protocol (2001).
Recommended for fans of spy thrillers and international conspiracies.
Robert Ludlum 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 300 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.
