Question: What is the best known novel by the author whose work was the basis for the French film Thomas the Impostor? 

Context articles: Jean Cocteau
Caroline Vermalle
Edwin Mullhouse
Olivier Le Cour Grandmaison
Gothic fiction
Edward Sorel
Thomas the Impostor
Ross Clark (journalist)
Pearl Cleage
Mort Gerberg

Jean Maurice Eugène Clément Cocteau (] ; 5 July 1889 – 11 October 1963) was a French writer, designer, playwright, artist and filmmaker.
 Cocteau is best known for his novel "Les Enfants Terribles" (1929), and the films "The Blood of a Poet" (1930), "Les Parents Terribles" (1948), "Beauty and the Beast" (1946) and "Orpheus" (1949).
 His circle of associates, friends and lovers included Kenneth Anger, Pablo Picasso, Gertrude Stein, Jean Hugo, Jean Marais, Henri Bernstein, Yul Brynner, Marlene Dietrich, Coco Chanel, Erik Satie, Albert Gleizes, Igor Stravinsky, Marie Laurencin, María Félix, Édith Piaf, Panama Al Brown, Colette, Jean Genet, and Raymond Radiguet.
Caroline Vermalle (born 1973) is a French author whose work, written in French and English, ranges from historical novels to thrillers.
Edwin Mullhouse: The Life and Death of an American Writer 1943-1954, by Jeffrey Cartwright is the critically acclaimed debut novel by American author Steven Millhauser, published in 1972 and written in the form of a biography of a fictitious person by a fictitious author.
 It was Millhauser's best known novel until the publication of his Pulitzer Prize-winning "Martin Dressler" in 1997, and according to Patrick McGrath writing in "The New York Times" it is his best work.
 "Edwin Mullhouse" is described by "Publishers Weekly" as a 'cult novel'.
Olivier Le Cour Grandmaison (born 19 September 1960), is a French historian and author whose work chiefly centres on colonialism.
 He is best known for his book "Coloniser, Exterminer - Sur la guerre et l'Etat colonial".
Gothic fiction, which is largely known by the subgenre of Gothic horror, is a genre or mode of literature and film that combines fiction and horror, death, and at times romance.
 Its origin is attributed to English author Horace Walpole, with his 1764 novel "The Castle of Otranto", subtitled (in its second edition) "A Gothic Story".
 The effect of Gothic fiction feeds on a pleasing sort of terror, an extension of Romantic literary pleasures that were relatively new at the time of Walpole's novel.
 It originated in England in the second half of the 18th century where, following Walpole, it was further developed by Clara Reeve, Ann Radcliffe, William Thomas Beckford and Matthew Lewis.
 The genre had much success in the 19th century, as witnessed by Mary Shelley's "Frankenstein" and the works of Edgar Allan Poe.
 Another well known novel in this genre, dating from the late Victorian era, is Bram Stoker's "Dracula".
 The name "Gothic" refers to the (pseudo)-medieval buildings, emulating Gothic architecture, in which many of these stories take place.
 This extreme form of romanticism was very popular in England and Germany.
 The English Gothic novel also led to new novel types such as the German "Schauerroman" and the French "Georgia".
Edward Sorel (born Edward Schwartz, 26 March 1929, The Bronx) is an illustrator, caricaturist, cartoonist, graphic designer and author whose work is known for its storytelling, its left-liberal social commentary, its criticism of reactionary right-wing politics and organized religion.
 Formerly a regular contributor to "The Nation", "New York Magazine" and "The Atlantic", his work is today seen more frequently in "Vanity Fair".
 He has been hailed by "The New York Times" as "one of America's foremost political satirists".
 As a lifelong New Yorker, a large portion of his work interprets the life, culture and political events of New York City.
 There is also a large body of work which is nostalgic for the stars of 1930s and 1940s Hollywood when Sorel was a youth.
 Sorel is noted for his wavy pen-and-ink style, which he describes as "spontaneous direct drawing".
Thomas the Impostor (French: "Thomas l'imposteur" ) is a 1964 French film directed by Georges Franju and starring Emmanuelle Riva, Fabrice Rouleau, Sophie Dares, Jean Marais and Charles Aznavour.
 It is based on a novel of the same name by Jean Cocteau, which had first been published in French in 1923 and had been inspired by Cocteau's experiences in the first World War.
 An American edition of the novel, translated into English by Lewis Galentiere, was published in 1925 under the title "Thomas the Impostor", and another English translation by Dorothy Williams was subsequently published in 1957 under the title "The Impostor".
 The film was entered into the 15th Berlin International Film Festival.
Ross Clark (born 12 September 1966) is a British journalist and author whose work has appeared in "The Spectator", "The Times" and other publications.
 He is the author of several books, including "How to Label a Goat: the silly Rules and Regulations that are strangling Britain" and "The Great Before", a novel which satirised the pessimism of the green movement.
 He is a frequent critic of British government policy, especially on its interventions in the housing market.
Pearl Cleage (born December 7, 1948) is an African American author whose work, both fiction and non-fiction, has been widely recognized.
 Her novel "What Looks Like Crazy on an Ordinary Day" was a 1998 Oprah Book Club selection.
 Cleage is known for her feminist views, particularly regarding her identity as an African American woman.
 Cleage teaches drama at Spelman College in Atlanta, Georgia and is the Playwright in Residence at the Alliance Theatre.
Mort Gerberg is a multi-genre American cartoonist and author whose work has appeared in magazines, newspapers, books, online, home video, film and television.
 He is best known for his magazine cartoons, which have appeared in numerous and diverse titles such as "The New Yorker", "Playboy", "Harvard Business Review", "The Huffington Post" and Paul Krassner’s "The Realist".
 He created a weekly news cartoon, "Out of Line," for "Publishers Weekly" from 1988-1994 and has drawn an editorial-page cartoon for "The Columbian", the weekly newspaper in Columbia County, New York, since 2003.