Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Sergey Letov, born on September 24, 1956, is a Russian musician, known for improvisational style, and the founder of Pentagram recording label. He has collaborated with numerous music artists including his younger brother Yegor Letov. Igor Fyodorovich "Yegor" Letov (10 September 1964, Omsk 19 February 2008, Omsk) was the creator and singer of the Russian punk band Grazhdanskaya Oborona (Civil Defense). He also formed the collective collage band "Communism", and played with female punk legend Yanka Dyagileva. Yegor Letov was cofounder of National Bolshevik Party.