Question: Were  Sidney Sheldon and W. Somerset Maugham both writers?

Context articles: Robert Calder (writer)
Somerset Maugham Award
The Buster Keaton Story
Sidney Sheldon
Bloodline (1979 film)
Trio (film)
Sidney Sheldon's After the Darkness
The Razor's Edge (1946 film)
W. Somerset Maugham
Tilly Bagshawe

Robert Lorin Calder, a Canadian writer and professor, won the Governor General's Award for English-language non-fiction in 1989 for his "Willie: The Life of W. Somerset Maugham", a biography based on extensive archival work and interviews with surviving associates of Maugham, in particular Alan Searle.
 Unlike Ted Morgan, who had obtained permission from Maugham's executors to publish from Maugham's letters in his biography (1980), Calder was refused permission to do so by the Royal Literary Fund and had to rely on paraphrase in referencing Maugham's unpublished correspondence.
The Somerset Maugham Award is a British literary prize given each May by the Society of Authors.
 It is awarded to the best writer or writers of a book published in the past year who is under the age of 35.
 The prize was instituted in 1947 by William Somerset Maugham and thus bears his name.
 The award is to be spent on foreign travel.
 The total fund for each year is £12,000.
The Buster Keaton Story is a 1957 American drama film directed by Sidney Sheldon and written by Sidney Sheldon and Robert Smith.
 The film stars Donald O'Connor, Ann Blyth, Rhonda Fleming, Peter Lorre, Larry Keating and Jackie Coogan.
 The film was released on April 21, 1957, by Paramount Pictures.
 The film was described by AllMovie as "sublimely inaccurate" regarding details of Keaton's life.
 It was produced by Paramount Pictures, which paid Keaton $50,000 for the rights to his life story, allowing Keaton to remain financially solvent for the remainder of his life.
Sidney Sheldon (February 11, 1917 – January 30, 2007) was an American writer and producer.
Bloodline is a thriller film picture released in 1979.
 Based upon the novel "Bloodline" by Sidney Sheldon, it was produced by Paramount Pictures and directed by Terence Young with music by Ennio Morricone.
 The film was also released under the title "Sidney Sheldon's Bloodline".
 It was the only R-rated film to star Audrey Hepburn.
Trio (also known as W. Somerset Maugham's Trio) is a 1950 British anthology film based on three short stories by W. Somerset Maugham: "The Verger", "Mr. Know-All" and "Sanatorium".
 Ken Annakin directed "The Verger" and "Mr. Know-All", while Harold French was responsible for "Sanatorium".
Sidney Sheldon's After the Darkness is a 2010 novel by Tilly Bagshawe.
 Bagshawe began writing Sidney Sheldon works after the latter's death in 2007.
 After writing "Mistress of the Game", Tilly Bagshawe once again recaptured the late Sidney Sheldon’s way of thriller writing in "After the Darkness".
 The novel echoes the Bernie Madoff scandal in America.
The Razor's Edge is the first film version of W. Somerset Maugham's 1944 novel of the same name.
 It was released in 1946 and stars Tyrone Power, Gene Tierney, John Payne, Anne Baxter, Clifton Webb, Herbert Marshall, with a supporting cast including Lucile Watson, Frank Latimore and Elsa Lanchester.
 Marshall plays Somerset Maugham.
 The film was directed by Edmund Goulding.
William Somerset Maugham CH ( ; 25 January 1874 – 16 December 1965), better known as W. Somerset Maugham, was a British playwright, novelist and short story writer.
 He was among the most popular writers of his era and reputedly the highest-paid author during the 1930s.
Matilda Emily "Tilly" Bagshawe (born 12 June 1973) is a British freelance journalist and author.
 She is best known for her books in the vein of best-selling American author Sidney Sheldon, notably "Sidney Sheldon's Mistress of the Game" and "Sidney Sheldon's After the Darkness".