Audio interview with Paul Preston here on Canal  Ser in Spanish about his book We Saw Spain Die about foreign journalists in the Spanish Civil War.

From review of We Saw Spain Die

In the minds of these correspondents, the quest for truth was not compromised but enhanced by commitment. This testament to their testimony could not have been supplied by a more erudite expert. Preston is a peerless historian of Spain, and the only one who writes as readably as a professional journalist.