question: The short story "The Interloper" is written by Jorge Luis Borges. What books is he best known for? 
answer: "Ficciones" ("Fictions") and "El Aleph" ("The Aleph")
context: Title: Borges and I
  Passage: "Borges and I" (originally in Spanish "Borges y Yo") is a short story by the Argentine writer and poet Jorge Luis Borges.  It is one of the stories in the short story collection, "The Maker" (originally in Spanish "El Hacedor"), first published in 1960.
  Title: Jorge Guillermo Borges Haslam
  Passage: Jorge Guillermo Borges Haslam (24 February 1874 – 14 February 1938) was an Argentine lawyer and writer.  He was the son of Colonel Francisco Borges Lafinur, an Argentine military officer of Uruguayan origins, and Frances Anne Haslam, an English native.  In 1898, he married Leonor Acevedo Suárez with whom he had two children: writer Jorge Luis Borges and painter Norah Borges.  Due to the failing eyesight that would eventually afflict his son, Borges Haslam eventually abandoned his law career law and the family moved to Geneva, Switzerland before World War I, where the young Jorge Luis was treated by an eye specialist.  In 1921, the Borges family returned to Argentina.
  Title: Jorge Luis Borges and mathematics
  Passage: Jorge Luis Borges and mathematics concerns several modern mathematical concepts found in certain essays and short stories of Argentinian author Jorge Luis Borges (1899-1986), including concepts such as set theory, recursion, chaos theory, and infinite sequences, although Borges' strongest links to mathematics are through Georg Cantor's theory of infinite sets, outlined in "The Doctrine of Cycles" ("La doctrina de los ciclos").  Some of Borges' most popular works such as "The Library of Babel" ("La Biblioteca de Babel"), "The Garden of Forking Paths" ("El Jardín de Senderos que se Bifurcan"), "The Aleph" ("El Aleph"), an allusion to Cantor's use of the Hebrew letter aleph (formula_1) to denote cardinality of transfinite sets.  and "The Approach to Al-Mu'tasim" ("El acercamiento a Almotásim") illustrate his use of mathematics.
  Title: Jorge Luis Borges
  Passage: Jorge Francisco Isidoro Luis Borges Acevedo {'1': ", '2': ", '3': ", '4': "} ( ; ]    ; 24 August 1899 – 14 June 1986) was an Argentine short-story writer, essayist, poet and translator, and a key figure in Spanish-language literature.  His best-known books, "Ficciones" ("Fictions") and "El Aleph" ("The Aleph"), published in the 1940s, are compilations of short stories interconnected by common themes, including dreams, labyrinths, libraries, mirrors, fictional writers, philosophy, and religion.
  Title: Three Versions of Judas
  Passage: "Three versions of Judas" (original Spanish title: "Tres versiones de Judas") is a short story by Argentine writer and poet Jorge Luis Borges.  It was included in Borges' anthology, "Ficciones", published in 1944.  Like several other Borges stories, it is written in form of a scholarly article.  The story carries three footnotes and quotes many people, some of which are real (like Antônio Conselheiro), some have been concocted from real life (like Maurice Abramowicz, who was once his classmate, and later became a deputy for the Swiss communist party, but is made a French religious philosopher in the story) and some are completely fictitious (like Jaromir Hladík, who is a character from his own story "The Secret Miracle").
  Title: Ulrikke (short story)
  Passage: "Ulrikke" (original Spanish title: "Ulrica") is a short story by Argentinian writer Jorge Luis Borges, collected in the anthology The Book of Sand.  It is notable because it is one of the few of Borges' stories in which women and sex play a central role.  The story begins with an epigraph quoting a verse of Chapter 27 of "Volsunga saga", ""Hann tekr sverðit Gram ok leggr i meðal þeira bert"", which means: ""He takes the sword Gram and lays it bare between them"".  The short story is about a meeting between Ulrica, a Norwegian woman, and a Colombian teacher, Javier Otálora (who tells the story), in York.  In this meeting, the couple falls in love each other and takes possession of the names of the heroes of the legendary saga contained in the epigraph: Brynhild and Sigurd, respectively.
  Title: Días de odio
  Passage: Días de odio, literally translated as Days of Hate, is a 1954 Argentine film.  It is based on the short story "Emma Zunz" by Jorge Luis Borges. Días de odio is a film Argentina in black and white directed by Leopoldo Torre Nilsson scripted himself about the story of Jorge Luis Borges entitled Emma Zunz, which was included in the book The Aleph and first released in 1949.  It was first performed the 3 of June 1954 and had as main protagonists Elisa Galvé , Nicolas Freguês, Raul del Valle, Enrique de Pedro, Duilio Marzio and Virginia Romay .  The producer of the film was Armando Bó .
  Title: Emma Zunz
  Passage: "Emma Zunz" is a short story by Argentine writer Jorge Luis Borges.  The tale recounts how its eponymous heroine avenges the death of her father.  Originally published in September 1948 in the magazine "Sur", it was reprinted in Borges' 1949 collection "The Aleph".  The story deals with the themes of justice and revenge, and of right and wrong.  As in several other short stories, Borges illustrates the difficulty in understanding and describing reality.  The story relies on issues of deceit, self-deception and inauthenticity to illustrate this.
  Title: Ghazal (1975 film)
  Passage: Ghazal (in Persian: غزل) is a 1975 Iranian film directed by Masoud Kimiai.  It stars Mohammad Ali Fardin, Faramarz Gharibian and Pouri Banayi.  It is based on the short story "The Interloper", written by Jorge Luis Borges.  Because Fardin had been typecast as a happy-go-lucky person who always appeared in movies with happy endings, this film was a departure for him and was not successful at the box office.
  Title: Borges on Martín Fierro
  Passage: Borges on Martín Fierro concerns Argentinian Jorge Luis Borges's comments on José Hernández's nineteenth century poem "Martín Fierro".  Like most of his compatriots, Borges was a great admirer of this work, which he often characterized as the one clearly great work in Argentine literature.  Because "Martín Fierro" has been widely considered (beginning with Leopoldo Lugones's "El Payador", 1916) the fountainhead or pinnacle of Argentine literature, Argentina's "Don Quixote" or "Divine Comedy", and because Borges was certainly Argentina's greatest twentieth-century writer, Borges's 1953 book of essays about the poem and its critical and popular reception - "El "Martín Fierro"" (written with Margarita Guerrero) - gives insight into Borges's identity as an Argentine.
citations: Ghazal (1975 film) Jorge Luis Borges