Mikhail Afanasyevich Bulgakov ( buul-GAH-kof; Russian: Михаил Афанасьевич Булгаков, IPA: [mʲɪxɐˈil ɐfɐˈnasʲjɪvʲɪdʑ bʊlˈɡakəf]; 15 May [O.S. 3 May] 1891 – 10 March 1940) was a Russian, later Soviet writer, medical doctor, and playwright active in the first half of the 20th century. He is best known for his novel The Master and Margarita, published posthumously, which has been called one of the masterpieces of the 20th century.
https://en.wikipedia.org/wiki/Mikhail_Bulgakov