Martin Walser (; born 24 March 1927) is a German writer. Life Walser was born in Wasserburg am Bodensee, on Lake Constance. His parents were coal merchants, and they also kept an inn next to the train station in Wasserburg. He described the environment in which he grew up in his novel Ein springender Brunnen (English: A Gushing Fountain). From 1938 to 1943 he was a pupil at the secondary school in Lindau and served in an anti-aircraft unit. According to documents released in June 2007, at the age of 17 he became a member of the Nazi Party on 20 April 1944, though Walser denied that he knowingly entered the party, a claim disputed by historian Juliane Wetzel. By the end of the Second World War, he was a soldier in the Wehrmacht. After the war he returned to his studies and completed his Abitur in 1946. He then studied literature, history, and philosophy at the University of Regensburg and the University of Tübingen. He received his doctorate in literature in 1951 for a thesis on Franz Kafka, written under the supervision of Friedrich Beißner. While studying, Walser worked as a reporter for the Süddeutscher Rundfunk radio station, and wrote his first radio plays. In 1950, he married Katharina "Käthe" Neuner-Jehle. He has four daughters from this marriage: Franziska Walser is an actress, Alissa Walser is a writer-and-painter, and Johanna and Theresia Walser are professional writers. Johanna has occasionally published in collaboration with her father. German journalist Jakob Augstein is Walser's illegitimate son from a relationship with translator Maria Carlsson.<ref>Gerrit Bartels: Augstein und Walser. Vater und Sohn: Eine gewisse Ähnlichkeit. In: Der Tagesspiegel. 28 November 2009. Retrieved 25 March 2012.</ref> Beginning in 1953 Walser was regularly invited to conferences of the Gruppe 47 (Group 47), which awarded him a prize for his story Templones Ende (English: Templone's End) in 1955. His first novel Ehen in Philippsburg (English: Marriages in Philippsburg) was published in 1957 and was a huge success. Since then Walser has been working as a freelance author. His most important work is Ein fliehendes Pferd (English: A Runaway Horse), published 1978, which was both a commercial and critical success. Walser received the Georg Büchner Prize in 1981. In 2004 Walser left his long-time publisher Suhrkamp Verlag for Rowohlt Verlag, after the death of Suhrkamp director Siegfried Unseld. An unusual clause in his contract with Suhrkamp Verlag made