Question: Are John Lanchester and David Guterson both writers?

Context articles: Mystery Street
Fragrant Harbour
The Debt to Pleasure
Capital (novel)
David Guterson
Snow Falling on Cedars
Snow Falling on Cedars (film)
John Lanchester
The John Forsythe Show
Capital (BBC adaptation)

Mystery Street is a 1950 black-and-white film noir directed by John Sturges with cinematography by cinematographer John Alton.
 The film features Ricardo Montalban, Sally Forrest, Bruce Bennett, and Elsa Lanchester.
Fragrant Harbour (2002) is a novel by author John Lanchester.
 It was shortlisted for the James Tait Black Memorial Prize (2002).
The Debt to Pleasure is a 1996 novel by John Lanchester published by Picador (imprint).
 The novel won the 1996 Whitbread Book Award in the First Novel category and the 1997 Hawthornden Prize.
 It was described as a skilful and wickedly funny account of the life of a loquacious Englishman named Tarquin Winot, revealed through his thoughts on cuisine as he undertakes a mysterious journey around France.
 The revelations become more and more shocking as the truth about the narrator becomes apparent.
Capital (ISBN  ) is a novel by John Lanchester, published by Faber and Faber in 2012.
 The novel is set in London prior to and during the 2008 financial crisis, jumping between December 2007, April 2008, and August 2008.
 The title refers both to London as the capital city of the United Kingdom, and to financial capital.
 All of the main characters have a connection to Pepys Road, a street in the south London suburb of Clapham.
David Guterson ( ; born May 4, 1956) is an American novelist, short story writer, poet, journalist, and essayist.
 He is best known as the author of the book "Snow Falling on Cedars".
Snow Falling on Cedars is a 1994 award-winning novel written by American writer David Guterson.
 Guterson, who was a teacher at the time, wrote the book in the early morning hours over a ten-year period.
 Because of the success of the novel, however, he quit his job and began to write full-time.
Snow Falling on Cedars is a film directed by Scott Hicks.
 It is based on David Guterson's award-winning novel of the same title.
 It was released in 1999 and was nominated for an Academy Award for Best Cinematography.
John Henry Lanchester (born 25 February 1962) is a British journalist and novelist.
 He was born in Hamburg, brought up in Hong Kong and educated in England; between 1972 and 1980 at Gresham's School in Holt, Norfolk, then at St John's College, Oxford.
 He is married to historian and author Miranda Carter, with whom he has two children, and lives in London.
The John Forsythe Show began as a situation comedy in the fall of 1965 on NBC, but at mid-season it switched to a spy show.
 In the first phase of the series, John Forsythe appeared as United States Air Force veteran John Foster, who inherited the private Foster School for Girls in San Francisco, California, from his late aunt, Victoria.
 Forsythe's co-stars were Elsa Lanchester as the principal, Miss Culver; Ann B. Davis, as the physical education teacher, Miss Wilson; and Guy Marks as Ed Robbins, Forsythe's aide and a former sergeant.
 Actors who portrayed students included Pamelyn Ferdin as Pamela, Darlene Carr as Kathy, Page and Brooke Forsythe (Forsythe's actual daughters) as Marcia and Norma Jean, Peggy Lipton, as Joanna, Tracy Stratford as Susan, and Sara Ballantine as Janice.
Capital is a three-part British television adaptation of John Lanchester’s novel "Capital".
 The series was written by Peter Bowker, directed by Euros Lyn and produced by Matt Strevens for Kudos Film & Television Company.
 The first episode was broadcast on BBC One on 24 November 2015.
 The story centres on a fictional Pepys Road in South London (although there are two actual Pepys Roads in South London - namely in Raynes Park and New Cross) and the lives of people with connections to it.
 Once an ordinary residential area, the value of each house in the street is approaching £2 million.
 Its residents range from those who were born there to the newly-wealthy who have only recently moved in.
 They all begin to receive postcards which say "We want what you have".
 They react to this in different ways.