Der Auftrag (English: The Assignment , subtitled "Or, on the Observing of the Observer of the Observers") is a 1986 novella by the Swiss writer Friedrich Dürrenmatt.
 The first English publication appeared in 1988, translated by Joel Agee.
 The experimental narrative is divided into twenty-four parts, each one a single sentence spanning many pages.
 In his forward to the 2008 English language edition, Theodore Ziolkowski notes that the inspiration for the twenty-four sentence structure came after listening to a recording of Glenn Gould performing the first half of Bach's "The Well-Tempered Clavier I", itself a work in twenty-four movements.
 Inspiration for the plot came from the Austrian poet Ingeborg Bachmann's unfinished novel "The Franza Case", which Dürrenmatt's second wife, documentary filmmaker Charlotte Kerr, was attempting to turn into a film at the time of their meeting.
The Judge and His Hangman (German: Der Richter und sein Henker ) is a 1950 novel by the Swiss writer Friedrich Dürrenmatt.
 It was first published in English in 1954, in a translation by Cyrus Brooks and later in a translation by Therese Pol.
 A new translation by Joel Agee appeared in 2006, published together with it sequel "Suspicion", as "The Inspector Bärlach Mysteries," with a foreword by Sven Birkerts.
 Together with Dürrenmatt's "", these stories are considered classics of crime fiction, fusing existential philosophy and the detective genre.
The Centre Dürrenmatt Neuchâtel (CDN) exhibits Friedrich Dürrenmatt's paintings and drawings.
 It is a part of Swiss National Library, just like Swiss Literary Archives, which has a close cooperation with CDN.
Suspicion (German: Der Verdacht ) is a crime novel by the Swiss writer Friedrich Dürrenmatt.
 It has also been published as The Quarry.
 It is the sequel to Dürrenmatt's "The Judge and His Hangman".
End of the Game (German: Der Richter und sein Henker) is a 1975 DeLuxe Color German political thriller drama film directed by Maximilian Schell and starring Jon Voight, Jacqueline Bisset, Martin Ritt and Robert Shaw.
 Co-written by Friedrich Dürrenmatt, the film is an adaptation of his 1950 crime novella "The Judge and His Hangman" (German: "Der Richter und sein Henker").
 Dürrenmatt also appeared in the film, and Donald Sutherland played the role of the corpse of "Ulrich Schmied".
 German silent film actress Lil Dagover made her last screen appearance before retirement in the film.
Friedrich Dürrenmatt (] ; 5 January 1921 – 14 December 1990) was a Swiss author and dramatist.
 He was a proponent of epic theatre whose plays reflected the recent experiences of World War II.
 The politically active author's work included avant-garde dramas, philosophical crime novels, and macabre satire.
 Dürrenmatt was a member of the Gruppe Olten.
The Marriage of Mr. Mississippi (German: Die Ehe des Herrn Mississippi ) is a play by the Swiss writer Friedrich Dürrenmatt.
 The play was written in 1950, but Dürrenmatt continued to revise it until 1980.
 It premiered on 26 March 1952 at the Munich Kammerspiele, directed by Hans Schweikart.
 It was then performed in Chile, Israel, and New York.
 The play was adapted into a 1961 film with the same title.
 The Iranian director and playwright Homayoun Ghanizadeh adapted the play in 2016 and staged the new production, "Mississippi Dies Seated", at the Vahdat Hall in Tehran.
"The Tunnel" is a short story by Friedrich Dürrenmatt, that came out in 1952.
 It belongs to the most important works of Dürrenmatt and is a classic among the surrealistic short stories.
 With the beginning of the story, Dürrenmatt parodies Thomas Mann.
 The first sentence is very long and nested.
 Furthermore, Dürrenmatts student is in a train and likes cigars – just like the young man in The Magic Mountain (Der Zauberberg).
Henry Roth (February 8, 1906 – October 13, 1995) was an American novelist and short story writer.
The Pledge (German: "Das Versprechen") is a crime novella by Swiss author Friedrich Dürrenmatt, published in 1958, after Dürrenmatt thought that his previous movie script, "Es geschah am hellichten Tag" ("It happened in broad daylight") did not have a realistic ending.
 That made-for-television story had demanded an ending in line with that of a typical detective story.
 Dürrenmatt, however, was a critic of that genre of literature, and thus he set out to write "Das Versprechen" as an expression of that criticism.
 Although it has been absent from some subsequent editions of the novella, the title of the original edition included the telling subtitle Requiem for the Detective Novel (German: "Requiem auf den Kriminalroman").

Question: Were Friedrich Dürrenmatt and Henry Roth both writers?
Answer: yes