ASIN B0006D5JSY John Costello and Oleg Tsarev, Deadly Illusions, Crown, 1993 Wilhelm Hoettl, The Secret Front, Frederick A. Praeger, 1954 ASIN B0007EFR8Y ; Enigma Books (September 1, 2003) Igor Lukes, Czechoslovakia Between Stalin and Hitler, Oxford University Press, 1996 Walter Krivitsky, In Stalin's Secret Service, Enigma Books, 2000 Alexander Orlov, The March of Time, St. Ermins Press, 2004. Walter Schellenberg, The Labyrinth, Harper and Bros, 1956. Pavel Sudoplatov, Special Tasks, Little, Brown and Company, 1994. Ally Hauptmann-Gurski, La Plevitskaya, Author's Publication, 2011 edition (2006 out of print) External links НИКОЛАЙ СКОБЛИН (1893–1937) // 100 великих разведчиков by Igor Damaskin. 1892 births 1938 deaths Russian generals Russian people of World War I White movement generals Russian All-Military Union members Soviet spies NKVD officers People killed in the Spanish Civil War Deaths by airstrike