Plotkin practiced law briefly. Plotkin published a book of poems called
Ghetto Gutters in 1927. A contemporary review remarked that "the poems are sometimes crude and immature; over-sentimental and yet callous," but also "redolent with the spicy garlic smells of Brownsville and the Bronx." Plotkin was approached by the publisher
Samuel Roth, who asked Plotkin to write a book for him. Plotkin agreed to write a novel about
Singapore, in which, he said, "I will ... project my imagination out into the Far East and write an allegory about me and my wife." In 1951
My Sister and I, a memoir attributed to Friedrich Nietzsche, was published, also by Samuel Roth. It alleged that Nietzsche had had an incestuous affair with his sister Elizabeth, and that he also had an affair with
Richard Wagner's wife
Cosima. The Princeton philosopher
Walter Kauffmann dismissed
My Sister and I as a forgery by Plotkin, but some scholars still uphold its authenticity. ==Personal life and death==