Question: Wonka Bar is from the novel written by this british novelist born in what year?

Context articles: Barbara Trapido
The Good Terrorist
Grantchester Grind
The Bachelors (novel)
William Heffernan
Wonka Bar
Robert Edric
Bernard the Brave
Roald Dahl
Deathscent

Barbara (Louise) Trapido, born 1941 as Barbara Schuddeboom, is a British novelist born in South Africa with German, Danish and Dutch ancestry.
 Born in Cape Town and growing up in Durban she studied at the University of Natal gaining a BA in 1963 before emigrating to London.
 After many years teaching, she became a full-time writer in 1970.
The Good Terrorist is a 1985 political novel written by the British novelist Doris Lessing.
 It was first published in September that year by Jonathan Cape in the United Kingdom and by Alfred A. Knopf in the United States.
 The book's protagonist is the naïve drifter Alice, who squats with a group of radicals in London and is drawn into their terrorist activities.
Grantchester Grind is a novel written by Tom Sharpe, a British novelist born in 1928 who was educated at Lancing College and then at Pembroke College, Cambridge.
The Bachelors is a novel written in 1960 by the Scottish author Muriel Spark, referred to by "The New York Times" as "the most gifted and innovative British novelist".
 It follows a group of British bachelors whose misogynistic world is shattered when they suddenly find themselves the target of blackmail and fraud.
William Heffernan (born August 22, 1940) is an American novelist born in New Haven, Connecticut.
 Before becoming a novelist, Heffernan was an investigative reporter for the "New York Daily News".
 For that work he was thrice nominated for a Pulitzer Prize.
 Heffernan left journalism in 1978 after receiving his first book contract for the novel "Broderick".
 He won the Heywood Broun Award twice, received the Robert F. Kennedy Journalism Award and has received a number of other local, state and regional honors.
 William Heffernan has received the Edgar Award, is a member of the Authors Guild, The Mystery Writers of America, and was once President of the International Association of Crime Writers.
 The film rights for the "The Dinosaur Club" were sold to Warner Bros in 1997 for $1 million.
The Wonka Bar is both a fictional candy bar, introduced as a key story point in the 1964 novel "Charlie and the Chocolate Factory" by Roald Dahl, and a type of consumer product candy bar inspired by the fictional confection.
 Wonka Bars appear in both film adaptations of the novel, "Willy Wonka & the Chocolate Factory" (1971) and "Charlie and the Chocolate Factory" (2005), and the play "Charlie and the Chocolate Factory the Musical" (2013) each with different packaging.
Robert Edric (born 14 April 1956) is the pseudonym of Gary Edric Armitage, a British novelist born in Sheffield.
 Nick Rennison has suggested that Edric might be "the finest and most adventurous writer of historical fiction of his generation".
Bernard the Brave is a novel written by British novelist Margery Sharp.
 It is the eighth novel in a series of nine known collectively as "The Rescuers" which tells the story of two little mice, Bernard and Miss Bianca, and their adventures as members of the Mouse Prisoner's Aid Society, a mouse organization dedicated to cheering up and rescuing prisoners around the world.
Roald Dahl ( , ] ; 13 September 1916 – 23 November 1990) was a British novelist, short story writer, poet, screenwriter, and fighter pilot.
 His books have sold more than 250 million copies worldwide.
Deathscent is a children's novel written by British novelist Robin Jarvis.
 Set in an alternate Tudor England, it was published in 2001 and is intended to be part of a longer series, entitled "Intrigues of the Reflected Realm," however sequels are yet to appear.
 During an interview in 2011, Jarvis stated that he wished to continue the series, and had worked out the plot for the second book in the series, however also said that he wasn't sure when work on it may begin.