Question: Are Irving Wallace and Margaret Atwood both writers?

Context articles: Surfacing (novel)
Procedures for Underground
Margaret Atwood
Double Persephone
Graeme Gibson
The Tent (Atwood book)
Good Bones and Simple Murders
Margaret Atwood: Once in August
Irving Wallace
Eden Mills Writers' Festival

Surfacing is the second published novel by Canadian author Margaret Atwood.
 It was first published by McClelland and Stewart in 1972.
 It has been called a companion novel to Atwood's collection of poems, "Power Politics", which was written the previous year and deals with complementary issues.
Procedures for Underground is a book of poetry written by Canadian author Margaret Atwood.
 It was published in hardcover by Little, Brown and Company in 1970, and in paperback by both Little, Brown and Company and Oxford University Press, Canada in 1971.
 The poems of "Procedures for Underground" explore the territory of the psyche, evoking mythological archetypes, subconscious experience, and personal obsessions.
 This space of epiphanies and metamorphosis is, for Atwood, the "underground."
Margaret Eleanor Atwood, {'1': ", '2': ", '3': ", '4': "} (born November 18, 1939) is a Canadian poet, novelist, literary critic, essayist, inventor, and environmental activist.
 She is a winner of the Arthur C. Clarke Award and Prince of Asturias Award for Literature, has been shortlisted for the Booker Prize five times, winning once, and has been a finalist for the Governor General's Award several times, winning twice.
 In 2001, she was inducted into Canada's Walk of Fame.
 She is also a founder of the Writers' Trust of Canada, a non-profit literary organization that seeks to encourage Canada's writing community.
 Among innumerable contributions to Canadian literature, she was a founding trustee of the Griffin Poetry Prize.
Double Persephone is a self-published poetry collection written by Canadian author Margaret Atwood in 1961.
 Atwood handset the book herself with a flat bed press, designed the cover with linoblocks, and only made 220 copies.
 It was the first publication released by Atwood, and comprises seven poems: "Formal Garden", "Pastoral", "Iconic Landscape", "Persephone Departing", "Chthonic Love", "Her Song", "and "Double Persephone".
Graeme C. Gibson, {'1': ", '2': ", '3': ", '4': "} (born 9 August 1934) is a Canadian novelist.
 He is a Member of the Order of Canada (1992) and was one of the organizers of the Writer's Union of Canada (chair, 1974–75).
 He is also a founder of the Writers' Trust of Canada, a non-profit literary organization that seeks to encourage Canada's writing community.
 He had two sons, Matt and Grae, with publisher Shirley Gibson.
 He has a long-term relationship with novelist and poet Margaret Atwood which began in 1973.
 They moved to a farm near Alliston, Ontario, where their daughter Eleanor Jess Atwood Gibson was born in 1976.
 The family returned to Toronto in 1980.
The Tent is a book by Canadian author Margaret Atwood, published in 2006.
 Although classified with Atwood’s short fiction, "The Tent" has been characterized as an “experimental” collection of “fictional essays" or “mini-fictions.”
 The work also incorporates line drawings by Atwood.
Good Bones and Simple Murders is a book by Canadian author Margaret Atwood, originally published in 1994.
 Although classified with Atwood’s short fiction, it is an eclectic collection, featuring parables, monologues, prose poems, condensed science fiction, reconfigured fairy tales, as well as Atwood’s own illustrations.
 Much of the book is a reprint of two earlier Atwood works, "Good Bones" and "Murder in the Dark".
Margaret Atwood: Once in August is a 1984 documentary film about Canadian writer Margaret Atwood, directed by Michael Rubbo and produced by the National Film Board of Canada (NFB).
 The film was made in Rubbo's trademark style of self-conscious documentary filmmaking or metafilm, with Rubbo foregrounding the creative process in making the film, including his frustrated attempts to uncover autobiographical influences in Atwood's work.
 It was his last film with the NFB.
Irving Wallace (March 19, 1916 – June 29, 1990) was an American best-selling author and screenwriter.
 He was known for his heavily researched novels, many with a sexual theme.
 He was a blue-collar writer who wrote for a blue-collar audience.
The Eden Mills Writers' Festival is organized once a year and held in the village of Eden Mills.
 Eden Mills is approximately 12 KM East of Guelph, Ontario, Canada and is a small village.
 The festival includes readings by poets, authors, and other writers at various outdoor venues throughout the village.
 The festival occurs on the second Sunday after Labour Day in September.
 In previous years more than 40 Canadian authors appeared to give readings and interact with audiences, including notable Canadian writers like Margaret Atwood and P. K. Page.
 On September 15, 2013, the Festival celebrated its 25th anniversary.