Roadhouse Nights is a 1930 American Pre-Code gangster film.
 A number of sources including Sally Cline in her book "Dashiell Hammett Man of Mystery" claim it is based on the classic novel "Red Harvest" written by Dashiell Hammett (author of "The Maltese Falcon", "The Thin Man", and "The Glass Key").
 However the credits of the film itself say only "An Original Screenplay by Ben Hecht."
 Hammett receives no mention at all (and the plots are not similar).
Michael Wiley writes the award-winning Joe Kozmarski hard-boiled detective mystery series, including the books "The Last Striptease" (2007), "The Bad Kitty Lounge" (2010), and "A Bad Night's Sleep" (2011).
 The series is set in contemporary Chicago.
 "The Last Striptease" won the PWA/SMP (Private Eye Writers of America/St. Martin's Press) prize for Best First Novel and was a nominee for a Shamus Award in the same category.
 "A Bad Night's Sleep" won the Best Hardback Shamus Award in 2012.
 Wiley's fiction has been praised broadly for reinvigorating the conventions of private detective novels, earning comparisons to Raymond Chandler and Dashiell Hammett along with other practitioners of PI writing.
Ved Prakash Sharma (10 June 1955 – 17 February 2017) was an Indian writer of novels and screenplays in Hindi.
 He was born in Meerut, Uttar Pradesh, where he completed his graduation from NAS Degree College.
 Having begun his professional career as a ghost writer, he went on to write 176 novels (ghostwriting around 23 novels of them).
 "Dahekte Shaher" (1973) was the first novel Sharma got credit for.
 He primarily wrote detective novels, among them "Kalyug ki Ramayan" and "Vardi Wala Gunda".
 The main characters in his detective novels were Vijay, Vikas, Alphanse, Vibha Jindal, Keshav pandit and Raina.
 According to his "Times of India" obituary his 1992 novel "Vardi Wala Gunda" "broke all records and sold 15 lakh copies on the very first day of its release", while the "Hindu" reported overall sales of "more than eight crore copies".
Samuel Dashiell Hammett ( ; May 27, 1894 – January 10, 1961) was an American author of hard-boiled detective novels and short stories, screenwriter, and political activist.
 Among the enduring characters he created are Sam Spade ("The Maltese Falcon"), Nick and Nora Charles ("The Thin Man"), and the Continental Op ("Red Harvest" and "The Dain Curse").
The Maltese Falcon is a 1929 detective novel by Dashiell Hammett, originally serialized in the magazine "Black Mask" beginning with the September 1929 issue.
 The story has been adapted several times for the cinema.
 The main character, Sam Spade, appears in this novel and in three lesser-known short stories and is widely cited as the crystallizing figure in the development of the hard-boiled private detective genre.
 Raymond Chandler's character Philip Marlowe, for instance, was strongly influenced by Hammett's Spade.
 Spade was a departure from Hammett's nameless detective, The Continental Op.
 Spade combined several features of previous detectives, notably his cold detachment, keen eye for detail, unflinching, sometimes ruthless, determination to achieve his own form of justice, and a complete lack of sentimentality.
George Raymond Richard Martin (born George Raymond Martin; September 20, 1948), often referred to as George R. R. Martin, is an American novelist and short-story writer in the fantasy, horror, and science fiction genres, screenwriter, and television producer.
 He is best known for his series of epic fantasy novels, "A Song of Ice and Fire", which was later adapted into the HBO series "Game of Thrones" (2011–present).
 Martin serves as the series's co-executive producer, and also scripted four episodes of the series.
Red Harvest (1929) is a novel by Dashiell Hammett.
 The story is narrated by The Continental Op, a frequent character in Hammett's fiction, much of which is drawn from his own experiences as an operative of the Pinkerton Detective Agency (fictionalized as the Continental Detective Agency).
 The labor dispute in the novel was inspired by Butte's Anaconda Road Massacre.
Hammett is a 1982 mystery film directed by Wim Wenders and executive produced by Francis Ford Coppola.
 The screenplay was written by Ross Thomas and Dennis O'Flaherty, based on the novel of the same name by Joe Gores.
 It stars Frederic Forrest as detective story writer Dashiell Hammett, who gets caught up in a mystery very much like one of his own stories.
 Marilu Henner plays Hammett's neighbor, Kit Conger, and Peter Boyle plays Jimmy Ryan, an old friend from Hammett's days as a Pinkerton agent.
Joseph Nicholas "Joe" Gores (born December 25, 1931, in Rochester, Minnesota, United States; died January 10, 2011, in Greenbrae, California) was an American mystery writer.
 He was known best for his novels and short stories set in San Francisco and featuring the fictional "Dan Kearney and Associates" (the "DKA Files") private investigation firm specializing in repossessing cars, a thinly veiled escalation of his own experiences as a confidential sleuth and repo man.
 Gores was also recognized for his novels "Hammett" (1975; made into the 1982 film "Hammett"), "Spade & Archer" (the 2009 prequel to Dashiell Hammett's "The Maltese Falcon") and his Edgar Award-winning or -nominated works, such as "A Time of Predators", "32 Cadillacs" and "Come Morning".
The Maltese Falcon is a 1931 American pre-Code crime film, based on the novel of the same name by Dashiell Hammett and directed by Roy Del Ruth.
 The film stars Ricardo Cortez as private detective Sam Spade and Bebe Daniels as Ruth Wonderly.
 Maude Fulton, Brown Holmes, and Lucien Hubbard (who went uncredited) wrote the screenplay.
 The supporting cast features Dudley Digges, Thelma Todd, Walter Long, Una Merkel, and Dwight Frye.
 The film is based on the 1929 novel "The Maltese Falcon" by Dashiell Hammett published by Alfred A. Knopf, Inc.

Question: Who wrote detective novels, George R. R. Martin or Dashiell Hammett?
Answer: Dashiell Hammett