Question: Who was a non-fiction writer, Isaac Bashevis Singer or Alvin Toffler

Context paragraphs:
Rencontre au Sommet: "Rencontre au Sommet.  Dialogue between Anthony Burgess and Isaac Bashevis Singer" is an 86-page book containing the complete transcripts of conversations between Anthony Burgess and Isaac Bashevis Singer when they met for a Swedish television documentary in 1985.

Esther Kreitman: Hinde Ester Singer Kreytman (31 March 1891 – 13 June 1954), known in English as Esther Kreitman, was a Yiddish-language novelist and short story writer.  She was born in Biłgoraj, Congress Poland to a rabbinic Jewish family.  Her younger brothers Israel Joshua Singer and Isaac Bashevis Singer subsequently became writers.

Eleanor Mlotek: Eleanor Chana Mlotek (née Gordon; April 9, 1922 – November 4, 2013) was a musicologist, specializing in Yiddish folklore.  Isaac Bashevis Singer, the Yiddish writer and Nobel laureate, once called Mrs. Mlotek and her husband, Joseph, “the Sherlock Holmeses of Yiddish folk songs.”  WorldCat lists her as author of 70 works in 112 editions, in 6 languages.  They include both collections of music and exhibition catalogs of Yiddish authors.  She held the position of Music Archivist at the YIVO Institute for Jewish Research, and was also a columnist at the "Yiddish Forward" for over forty years.  She was born in Brooklyn and is the mother of Zalmen Mlotek, the artistic director of the Folksbiene.

Isaac Bashevis Singer: Isaac Bashevis Singer (Yiddish: יצחק באַשעװיס זינגער‎ ; November 21, 1902 – July 24, 1991) was a Polish-born Jewish writer in Yiddish, awarded the Nobel Prize in Literature in 1978.  The Polish form of his birth name was Icek Hersz Zynger.  He used his mother's first name in an initial literary pseudonym, "Izaak Baszewis", which he later expanded.  He was a leading figure in the Yiddish literary movement, writing and publishing only in Yiddish.  He was also awarded two U.S. National Book Awards, one in Children's Literature for his memoir "A Day Of Pleasure: Stories of a Boy Growing Up in Warsaw" (1970) and one in Fiction for his collection "A Crown of Feathers and Other Stories" (1974).

The Reencounter: "The Reencounter" is a short story by American writer Isaac Bashevis Singer.  The story takes place in New York City and deals with death and the idea of an afterlife.

Irene Lieblich: Irene Lieblich (April 20, 1923 – December 28, 2008) was a Polish-born artist and Holocaust survivor noted for illustrating the books of Nobel laureate Isaac Bashevis Singer and for her paintings highlighting Jewish life and culture.  She is also a distant cousin of noted Yiddish language author and playwright Isaac Leib Peretz.

Shop Talk: Shop Talk: A Writer and His Colleagues and Their Work is a collection of previously published interviews with important 20th-century writers by novelist Philip Roth.  Among the writers interviewed are Primo Levi, Aharon Appelfeld, Ivan Klima, Isaac Bashevis Singer, Milan Kundera, and Edna O'Brien.  In addition, the book contains a discussion with Mary McCarthy about Roth's novel "The Counterlife" and a "New Yorker" essay on Saul Bellow.  Roth's trip to Israel to interview Appelfeld inspired his novel "Operation Shylock".

Israel Joshua Singer: Israel Joshua Singer (Yiddish: ישראל יהושע ; November 30, 1893, Biłgoraj, Congress Poland — February 10, 1944 New York) was a Polish American novelist who wrote in Yiddish.  He was born Yisruel Yehoyshye Zinger, the son of Pinchas Mendl Zinger, a rabbi and author of rabbinic commentaries, and Basheva Zylberman.  He was the brother of author Isaac Bashevis Singer and novelist Esther Kreitman.  He married Genia Kuper.  His eldest son, Yasha, died of influenza before the family's emigration to America.  His younger son, Joseph Singer was the translator for both his father's works and his uncle, Isaac Bashevis Singer.  Joseph a painter and writer like his father married June Flaum Singer who went on to become a writer.  They had four children: Sharon Salinger, Brett Singer, IJ Singer and Valerie Singer.  The three daughters followed in the family business and are also published poets and novelists.

Alvin Toffler: Alvin Toffler (October 4, 1928 – June 27, 2016) was an American writer, futurist, and businessman known for his works discussing modern technologies, including the digital revolution and the communication revolution, with emphasis on their effects on cultures worldwide.

Isaac in America: A Journey with Isaac Bashevis Singer: Isaac in America: A Journey with Isaac Bashevis Singer

Supporting paragraphs: Alvin Toffler Isaac Bashevis Singer
Answer: Alvin Toffler