 His career as a translator began with Hitler's "Mein Kampf", 
commissioned by Houghton Mifflin and published in 1943.Manheim endeavored to give an exact English equivalent of Hitler's highly individual, often awkward style, including his grammatical errors.Manheim translated the works of Bertolt Brecht (in collaboration with John Willett), Louis-Ferdinand Céline, Günter Grass, Peter Handke, philosopher Martin Heidegger, Hermann Hesse, Novalis, and many others.