FBI Fichiers Secrets was a series of crime novels published in France by Rome-based Editions ERP during the early 1960s. The authors’ names are all pseudonyms—the books were really written by guys like Pino Belli, Aldo Crudo, Gualberto Titta, Nino Giannini, Gianfranco Parolini, and others. Above you see ten covers with top art from Mario Ferrari. You can see more masterworks from Ferrari here, here, and here.
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