The Persecutor, also known as Forgive Me Natasha and less commonly as Sergei, is the autobiography of Sergei Kourdakov, a former KGB agent who persecuted Christians in the Soviet Union in the 1970s, but defected to Canada in 1971 and converted to Evangelical Christianity. The book was finished shortly before his death in January 1973 and published posthumously. It was published in English, then translated to at least fourteen languages including German, Spanish, French, Russian, and Dutch. Although the English versions have since ceased publication, various foreign-language versions are still in print. Source: Wikipedia (en)