Question: Are Ernst Toller and Patricia Highsmith both writers?

Context articles: Ripley's Game (film)
Patricia Highsmith
The Price of Salt
Ernst Toller
Die Welt ist schön
Deep Water (Highsmith novel)
Aline Valangin
The Two Faces of January
League for Proletarian Culture
Ernst-Toller-Preis

Ripley's Game is a 2002 thriller film directed by Liliana Cavani.
 It is adapted from the 1974 novel of the same name, the third in Patricia Highsmith's ""Ripliad"", a series of books chronicling the murderous adventures of con artist Tom Ripley.
 John Malkovich stars as Ripley, opposite Dougray Scott and Ray Winstone.
 Highsmith's novel was previously adapted in 1977 as "The American Friend" by director Wim Wenders, starring Dennis Hopper and Bruno Ganz.
Patricia Highsmith (January 19, 1921 – February 4, 1995) was an American novelist and short story writer, known for her psychological thrillers, which led to more than two dozen film adaptations.
 Her first novel, "Strangers on a Train", has been adapted for stage and screen numerous times, notably by Alfred Hitchcock in 1951.
 Highsmith wrote 22 novels, including her series of five novels with Tom Ripley as protagonist, and many short stories.
 Existentialism is the literary movement that most influenced her writing, with "Dostoyevsky and Gide through Camus and Sartre" among her favorite authors.
 Graham Greene described Highsmith as "the poet of apprehension rather than fear.
 Fear after a time...is narcotic, it can lull one by fatigue into sleep, but apprehension nags at the nerves gently and inescapably."
 Published under the pseudonym of "Claire Morgan," Highsmith wrote the first lesbian novel with a happy ending, "The Price of Salt", republished 38 years later as "Carol" under her own name.
The Price of Salt (later republished under the title Carol) is a 1952 romance novel by Patricia Highsmith, first published under the pseudonym "Claire Morgan".
 Highsmith—known as a suspense writer based on her psychological thriller "Strangers on a Train"—used an alias because she did not want to be tagged as "a lesbian-book writer", and because of the use of her own life references for characters and occurrences in the story.
 Though Highsmith had many sexual and romantic relationships with women and wrote over 22 novels and numerous short stories, "The Price of Salt" is her only novel about an unequivocal lesbian relationship and its relatively happy ending was unprecedented in lesbian literature.
 It is also notable for being the only one of her novels with not only "a conventional 'happy ending but in which her characters also had "more explicit sexual existences".
Ernst Toller (1 December 1893 – 22 May 1939) was a German left-wing playwright, best known for his Expressionist plays.
 He served in 1919 for six days as President of the short-lived Bavarian Soviet Republic, and was imprisoned for five years for his actions.
 He wrote several plays and poetry during that period, which gained him international renown.
 They were performed in London and New York as well as Berlin.
 In 2000, several of his plays were published in an English translation.
Die Welt ist schön ("The World is Beautiful") is a 1928 book of photography by German photographer Albert Renger-Patzsch.
 A popular work at the time, "Die Welt ist schön" is generally considered one of the most important books of photography published in the Weimar Republic, and as an iconic example of the photography of New Objectivity.
 Renger-Patzsch's book provoked emphatic reactions upon release: while contemporaries such as Ernst Toller and Thomas Mann praised "Die Welt ist schön", it was sharply criticized by figures like Walter Benjamin and Bertolt Brecht, who felt that Renger-Patzsch's work was too beholden to a naive idea of photographic realism and ended up aestheticizing everything, thus obscuring social realities.
Deep Water is a psychological thriller novel by Patricia Highsmith, first published in 1957 by Harper & Brothers.
 It is Highsmith's fifth published novel, the working title originally being "The Dog in the Manger."
 It was brought back into print in the US in 2003 by W. W. Norton & Company.
Aline Valangin was a Swiss writer, pianist, and psychoanalyst.
 In Zurich she was follower of Carl Jung and became a psychoanalyst.
 With Vladimir Rosenbaum (1894–1984, her husband from 1917 to 1940), at Comologno she helped and played host to migrants as Ignazio Silone, Ernst Toller, and Kurt Tucholsky.
 In 1931, she loved Silone, read his masterpiece "Fontamara", and helped him to publish it.
The Two Faces of January (1964) is a psychological thriller novel by Patricia Highsmith.
 Its title alludes to the two faces of the Roman god Janus, after whom the month of January was named.
 Biographer Andrew Wilson, in his 2003 publication "Beautiful Shadow: A Life of Patricia Highsmith" claims the title is 'appropriate for the janus-faced, flux-like nature of her protagonists'.
The League for Proletarian Culture (German: "Bund für proletarische Kultur" ) was a short-lived German left-wing organisation for the promotion of proletarian culture.
 It was founded in Berlin in spring 1919 by Alfons Goldschmidt, Arthur Holitscher, and Ludwig Rubiner and was dissolved in early 1920.
 It sought to promote "the eternal values bequeathed by the illustrious spirits of the past."
 Under the auspices of the experimental theatre the Tribüne (founded in September 1919), it staged Ernst Toller's "Transformation" ("Die Wandlung"), which opened on 30 September 1919 with a cast that included Fritz Kortner.
 The production ran into difficulties in mid-October, however, when some of its cast refused to play for metalworkers who were on strike at the time, which led to the termination of the relationship between the League and the Tribüne.
 The director Karlheinz Martin and dramaturg Rudolf Leonhard, both of whom had worked on the Toller production, formed the "Proletarian Theatre of the League for Proletarian Culture" ("Proletarisches Theater des Bundes für proletarische Kultur").
 It produced Herbert Kranz's "Freedom" ("Freiheit"), which opened on 14 December 1919 on the platform of the Philharmonic Hall.
 Despite the production's success, having filled the auditorium, only one performance was given.
 The newspaper "The Red Flag" ("Rote Fahne") thought that in its promotion of individual self-realisation through self-sacrifice the play adopted an anarchist political position.
Ernst-Toller-Preis is a Bavarian literary prize, awarded every two years in the name of Ernst Toller.