Igor Gouzenko "The Iron Curtain" (1948)
http://www.conservativeclassics.com/books/IronCurtainbk/BOOK09.PDF
A.Rossi "A Communist Party in action. An account of the organization and operations in France" (1949)
http://www.conservativeclassics.com/books/Partybk/BOOK07.PDF
John T.Flynn "While you slept. Our tragedy in Asia and who made it" (1951)
http://www.conservativeclassics.com/books/Sleptbk/BOOK04.PDF