Question: What is the nationality of the author of the novel on which The Shell Seekers was based?

Context articles: The Treasure Seekers (1996 film)
The Shell Seekers (film)
September (novel)
The Shell Seekers
Rosamunde Pilcher
The Shell Seekers (1989 film)
The Seekers (miniseries)
Non-refoulement
The Kent Family Chronicles
The Italian (novel)

The Treasure Seekers is a 1996 British television family film directed by Juliet May and starring Camilla Power, Felicity Jones and Kristopher Milnes.
 In Edwardian England, a family have only a few days to raise enough money to stop their home being repossessed.
 It is based on the novel "The Story of the Treasure Seekers" by E. Nesbit.
The Shell Seekers (German: "Die Muschelsucher" ) is a 2006 mini-series starring Academy Award-winners, Vanessa Redgrave and Maximilian Schell.
 The British-German co-production was directed by Piers Haggard.
 It is an adaptation of Rosamunde Pilcher's 1987 novel of the same name and premiered on Germany's ZDF on December 25, 2006.
 It was screened in the United States on the Hallmark Channel on 3 May 2008.
September is a novel by Rosamunde Pilcher.
 "September" was published in 1990, three years after "The Shell Seekers".
 Although one "Shell Seekers" character, Noel Keeling, makes a fairly minor appearance, a new cast of characters is introduced.
The Shell Seekers is a 1987 novel by Rosamunde Pilcher.
 It became one of her most famous best-sellers.
 It was nominated by the British public in 2003 as one of the top 100 novels in the BBC's Big Read.
 In Germany the novel is called " 'Die Muschelsucher', " and was also in the top 100 novels The novel sold more than five million copies worldwide, and was adapted for the stage and as a film for television twice.
Rosamunde Pilcher, OBE (née "Scott"; born 22 September 1924) is a British writer of several short-stories and 28 romance novels and mainstream women's fiction from 1949 to 2000, when she retired from writing.
 Early in her career she was also published under the pen name Jane Fraser.
 Her son is the writer Robin Pilcher.
The Shell Seekers is a 1989 Hallmark Hall of Fame television film based on the 1987 novel "The Shell Seekers" by Rosamunde Pilcher and starring Angela Lansbury.
 The film aired on ABC on December 3, 1989 in the U.S. and on ITV on December 21, 1989 in the UK; it was later reaired on CBS on January 31, 1993.
The Seekers is a 1979 1979 American made-for-television drama film/miniseries based on the historical novel "The Seekers" written by John Jakes, originally published in 1975.
 It is third in a series known as The Kent Family Chronicles or the American Bicentennial Series.
 The story mixes fictional characters with historical events and figures, as it narrates the story of the United States of America from 1794 through 1814.
 In 1979, the novel was made into a television film by Operation Prime Time and premiered on HBO on July 8 and 9, 1979.
Non-refoulement ( ) is a fundamental principle of international law which forbids a country receiving asylum seekers from returning them to a country in which they would be in likely danger of persecution based on "race, religion, nationality, membership of a particular social group or political opinion" (See Article 33 below).
 Unlike political asylum, which applies to those who can prove a well-grounded fear of persecution based on certain category of persons, non-refoulement refers to the generic repatriation of people, including refugees into war zones and other disaster locales.
 It is a principle of customary international law, as it applies to states that are not parties to the 1951 Convention Relating to the Status of Refugees or its 1967 Protocol.
 It is also a principle of the trucial law of nations.
The Kent Family Chronicles (also known as The American Bicentennial Series) is a series of eight novels by John Jakes written to commemorate the 200th anniversary of the Declaration of Independence of the United States.
 The books became best sellers, with no novel in the series selling fewer than 3.5 million copies.
 With "The Rebels," "The Seekers," and "The Furies," Jakes became the first author to have three books on the "New York Times" bestseller list in a single year (1975).
The Italian, or the Confessional of the Black Penitents (1797) is a Gothic novel written by the English author Ann Radcliffe.
 It is the last book Radcliffe published during her lifetime (she would go on to write the novel "Gaston de Blondeville", which was published posthumously in 1826).
 "The Italian" has a dark, mysterious and somber tone, and concerns the themes of love, devotion and persecution by the Holy Inquisition.
 The novel also deals with issues prevalent at the time of the French Revolution, such as religion, aristocracy, and nationality.
 Radcliffe's renowned use of veiled imagery is considered to have reached its height of sophistication and complexity in "The Italian"; concealment and disguise are central motifs of the novel.
 In line with late 18th-century sensibility and its parallel fetishisation of the sublime and the sentimentally pastoral, the heightened emotional states of Radcliffe's characters are often reflected through the pathetic fallacy.
 The novel is noted for its extremely effective antagonist, Father Schedoni.