Question: Pinhead is a character in the series based on the novels by which English author?

Context paragraphs:
Pinhead (Hellraiser): Pinhead is a fictional character from the "Hellraiser" series.  His name is derived from a sobriquet given to him by the crew of the first "Hellraiser" film.  Nearly thirty years later, Clive Barker gave him the proper designation Hell Priest in his sequel to "The Hellbound Heart", "The Scarlet Gospels".

List of works by Georgette Heyer: Georgette Heyer (1902–1974) was an English author particularly known for her historical romance novels set in the Regency and Georgian eras.  A best-selling author, Heyer's writing career saw her produce works from a variety of genres; in total she published 32 novels in the romance genre, 6 historical novels, 4 contemporary novels, and 12 in the detective fiction genre.

Chronicles of Barsetshire: The Chronicles of Barsetshire is a series of six novels by the English author Anthony Trollope, set in the fictitious English county of Barsetshire and its cathedral town of Barchester.  The novels concern the dealings of the clergy and the gentry, and the political, amatory, and social manœuvrings that go on among and between them.  Of the six novels, the second in the series, "Barchester Towers", is generally the best known, while the last was Trollope's own favourite.  Together, the series is regarded by many as Trollope's finest work.

Wolf of the Plains: Wolf of the Plains (2007) is a historical novel from English author Conn Iggulden.  It is the first book in the Conqueror series based on the Mongols of the Asian steppes.  It is titled "Genghis: Birth of an Empire" in the United States.

Robert B. Parker: Robert Brown Parker (September 17, 1932 – January 18, 2010) was an American writer of fiction, primarily of the mystery/detective genre.  His most famous works were the 40 novels written about the private detective Spenser.  ABC television network developed the television series "" based on the character in the mid-1980s; a series of TV movies based on the character were also produced.  His works incorporate encyclopedic knowledge of the Boston metropolitan area.  The Spenser novels have been cited by critics and bestselling authors such as Robert Crais, Harlan Coben and Dennis Lehane as not only influencing their own work but reviving and changing the detective genre.  Parker also wrote two other series based on an individual character: He wrote nine novels based on the character Jesse Stone and six novels based on the character Sunny Randall.  Mr. Parker wrote four Westerns starring the duo Virgil Cole and Everett Hitch.  The first, Appaloosa, was made into a film with Ed Harris.

Barbara Cartland: Dame Mary Barbara Hamilton Cartland DBE CStJ (9 July 1901 – 21 May 2000) was an English author of romance novels, one of the best-selling authors as well as one of the most prolific and commercially successful worldwide of the twentieth century.  Her 723 novels were translated into 38 languages and she continues to be referenced in the "Guinness World Records" for the most novels published in a single year in 1976.  As Barbara Cartland she is known for her numerous romantic novels but she also wrote under her married name of Barbara McCorquodale and briefly under the pseudonym of Marcus Belfry.  She wrote more than 700 books, as well as plays, music, verse, drama, magazine articles and operetta, and was a prominent philanthropist.  She reportedly sold more than 750 million copies.  Other sources estimate her book sales at more than two billion copies.  She specialised in 19th-century Victorian era pure romance.  Her novels all featured portrait-style artwork, particularly the cover art, usually designed by Frances Marshall.

Neil Gaiman: Neil Richard MacKinnon Gaiman ( ; born Neil Richard Gaiman, 10 November 1960) is an English author of short fiction, novels, comic books, graphic novels, audio theatre, and films.  His notable works include the comic book series "The Sandman" and novels "Stardust", "American Gods", "Coraline", and "The Graveyard Book".  He has won numerous awards, including the Hugo, Nebula, and Bram Stoker awards, as well as the Newbery and Carnegie medals.  He is the first author to win both the Newbery and the Carnegie medals for the same work, "The Graveyard Book" (2008).  In 2013, "The Ocean at the End of the Lane" was voted Book of the Year in the British National Book Awards.

David Kessler (author): David Kessler (born 1 April 1957) is an English author of mystery novels and thrillers.  The plots of his novels often involve people falsely accused of crimes, legal battles, DNA, computer hacking and police investigations and are characterised by multiple plot twists and last-minute surprises.  With the exception of "A Fool for a Client", his early novels (published by Hodder Headline) were set in Britain.  His new series of books (published by HarperCollins) is set in the Bay Area of California and centres on a series of recurring characters including the lawyer Alex Sedaka and his paralegal Juanita Cortez.  His latest series, published under the pseudonym "Adam Palmer", introduces the character of Daniel Klein, an expert on ancient Semitic languages.

Bernard Cornwell: Bernard Cornwell, OBE (born 23 February 1944) is an English author of historical novels and a history of the Waterloo Campaign.  He is best known for his novels about Napoleonic Wars rifleman Richard Sharpe.  Cornwell has written historical novels primarily of English history in five series and one series of contemporary thriller novels.  A feature of his historical novels is an end note on how the novel matches or differs from history, for the re-telling, and what one might see at the modern site of the battles described in the novel.  One series of historical novels is set in the American Civil War.  He wrote a nonfiction book on the battle of Waterloo, in addition to the fictional story of the famous battle in the Sharpe Series.  Two of the historical novel series have been adapted for television; the Sharpe television series by ITV and "The Last Kingdom" by BBC.  He lives in the US with his wife.  He alternates between Cape Cod, Massachusetts and Charleston, South Carolina.

Hellraiser (franchise): Hellraiser is a British horror franchise that consists of ten films, a series of comic books, and additional merchandise and media.  The franchise is based on the novella "The Hellbound Heart" by English author Clive Barker, who would go on to write and direct the adaptation of his story, titled "Hellraiser".  The films, as well as the comic book series, continually feature the Cenobite Pinhead.

Supporting paragraphs: Pinhead (Hellraiser) Hellraiser (franchise)
Answer: Clive Barker