Writing under a pseudonym, an Englishman Tells All, not only of his life as a Russian Secret Service operator, but also of the details of the mechanics of Russia's spy nt as he knew it. From England, to fight in the Spanish Civil War, to the International Brigade, on to a special assignment, and then the recruitment, in 1938, as a spy for Russia. Ordered to Switzerland, his first mentor, Sonia, inducted him into elementary training, and, when sent to Munich and happening on Hitler's Stammtisch, he became specially singled out for more important work. From anti- to pro-German espionage -- and back again, as Russian switches occurred -- this accounts for his active work in Switzerland for three years -- the installation of music boxes (wireless), the intricate web of contacts, the unending routine of the system of messages and coding, the vigilance against police apprehension, the sources and means of information. Caught at last and imprisoned, but never found guilty, making his way to Paris, he later was flown to Moscow where intensive training -- after proof of bona fides -- took place and further orders issued. In Berlin he walked out of his assumed personality into his real one- from the Russian zone into the British. This underlines the Russian threat, links the Canadian spy case to his own, warns of the danger of a vast network so easily available through Party membership, and makes more vivid the spy uncoverage to date. Of definite current interest, and for those who want the real background of fictional thrillers.