Question: What is the best-seller by Ruta Sepetys?

full_context: Document 1: Isaac in America: A Journey with Isaac Bashevis Singer: Isaac in America: A Journey with Isaac Bashevis Singer
Document 2: The Beautiful Things That Heaven Bears: "The Beautiful Things That Heaven Bears", is the debut novel of Ethiopian author Dinaw Mengestu. Published in 2007 by the Penguin Group the novel focuses on the life of Sepha Stephanos, an Ethiopian immigrant living in Washington, D.C. after fleeing his country’s revolution seventeen years earlier. Running a failing grocery store he ruminates on the past as he faces his own inward crisis of displacement and identity while simultaneously marveling at the gentrification of his neighborhood. This book took close to four years to write and Mengestu spent the better part of a year reviewing it. The original version of this novel was published in the UK as "Children of the Revolution". The name was changed by the publishers before being published in the US because they didn't want the book to sound political. His novel, The Beautiful Things That Heaven Bears (2007) was translated into 12 languages, and named a New York Times Notable Book. The book was also awarded the Guardian First Book Award and the Los Angeles Times Art Seidenbaum Award for First Fiction, among numerous other honors.
Document 3: Salt to the Sea: Salt to the Sea is a 2016 historical fiction young adult novel by Ruta Sepetys. It tells the story of four individuals in World War II who make their way to the ill-fated MV "Wilhelm Gustloff". The story also touches on the disappearance of The Amber Room, a work of art stolen by the Nazis that has never been recovered.
Document 4: Ruta Sepetys: Ruta Sepetys or Rūta Šepetys (born November 19, 1967) is a Lithuanian-American writer of historical fiction. As an author, she is a #1 "New York Times" bestseller, international bestseller, and winner of the Carnegie Medal.Sepetys is a Rockefeller Foundation Bellagio Fellow and the first American writer of young adult literature to speak at European Parliament. Her work is published in over fifty countries and thirty languages and is currently in development for two films.
Document 5: Sonechka: Sonechka is a novella and collection of short stories by Russian writer Lyudmila Ulitskaya. It was originally published in Russian in the literary journal "Novy Mir" in 1992, and translated into English by Arch Tait in 2005. "Sonechka" was nominated for the Russian Booker Prize.
Document 6: Their Darkest Hour: Their Darkest Hour: People Tested to the Extreme in WWII, is a book written by Laurence Rees which explores the stories of soldiers and civilians involved in the second world war. It examines the experiences of Western Allied soldiers during the war, as well as the experiences of Axis and Soviet soldiers. The stories are told in the format of short stories, between five and ten pages long, with the stories sub-categorised, displaced persons, POW's etc. Unlike other books written by Laurence Rees it is not a companion to a television series.
Document 7: Under a Cruel Star: Under a Cruel Star: A Life in Prague 1941-1968 was published first under this title by Plunkett Lake Press, Cambridge, Massachusetts in 1986. The memoir was written by Heda Margolius Kovály and translated with Franci and Helen Epstein. It is now available in a Holmes & Meier, New York 1997 edition (ISBN  ), in a Plunkett Lake Press 2010 eBook edition and in a Granta, London 2012 edition (ISBN  ). "Prague Farewell" was the book title in the UK in previous editions. The memoir was originally written in Czech and published in Canada under the title "Na vlastní kůži" by 68 Publishers, a well-known publishing house for Czech expatriates, in Toronto in 1973. An English translation appeared in the same year as the first part of the book "The Victors and the Vanquished" published by Horizon Press in New York. A British edition of the book excluded the second treatise and was published by Weidenfeld and Nicolson under the title "I Do Not Want To Remember" in 1973. The book is also available in Chinese (ISBN  ), Danish (ISBN  ), Dutch (ISBN  ), French (ISBN  ), German (ISBN  ), Romanian (ISBN  ), Spanish (ISBN  ) and the original Czech editions (ISBN  ).
Document 8: Leila Aboulela: Leila Aboulela (born 1964), Arabic 'ليلى ابوالعلا' is a Sudanese writer who writes in English. Her latest novel, "The Kindness of Enemies" is inspired by the life of Imam Shamil, who united the tribes of the Caucasus to fight against Russian Imperial expansion. Leila's novel "Lyrics Alley", was Fiction Winner of the Scottish Book Awards and short-listed for a Regional Commonwealth Writers Prize. She is also the author of the novels "The Translator" (a New York Times 100 Notable Book of the Year) and "Minaret". All three novels were long-listed for the Orange Prize and the IMPAC Dublin Award. Leila Aboulela won the Caine Prize for African Writing for her short story, "The Museum", included in the collection "Coloured Lights" which went on to be short-listed for the Macmillan/Silver PEN award. Aboulela’s work has been translated into fourteen languages and included in publications such as "Granta", "The Washington Post" and "The Guardian". BBC Radio has adapted her work extensively and broadcast a number of her plays including "The Mystic Life" and the historical drama "The Lion of Chechnya". The five-part radio serialization of her novel "The Translator" was short-listed for the RIMA (Race In the Media Award). Aboulela grew up in Khartoum and now lives in Aberdeen.
Document 9: Sara Raasch: Sara Raasch (born August 26, 1989) is an American author of young adult fiction. She wrote the fantasy "New York Times" Bestselling trilogy "Snow Like Ashes" (Balzer + Bray/HarperCollins) as well as a forthcoming untitled fantasy series (Balzer + Bray/HarperCollins).
Document 10: Soviet deportations from Lithuania: Soviet deportations from Lithuania were a series of 35 mass deportations carried out in Lithuania, a country that was occupied as a constituent socialist republic of the Soviet Union, in 1941 and 1945–1952. At least 130,000 people, 70% of them women and children, were forcibly transported to labor camps and other forced settlements in remote parts of the Soviet Union, particularly in the Irkutsk Oblast and Krasnoyarsk Krai. Among the deportees were about 4,500 Poles. These deportations do not include Lithuanian partisans or political prisoners (approximately 150,000 people) deported to Gulags (prison camps). Deportations of the civilians served a double purpose: repressing resistance to Sovietization policies in Lithuania and providing free labor in sparsely inhabited areas of the Soviet Union. Approximately 28,000 of Lithuanian deportees died in exile due to poor living conditions. After Stalin's death in 1953, the deportees were slowly and gradually released. The last deportees were released only in 1963. Some 60,000 managed to return to Lithuania, while 30,000 were prohibited from settling back in their homeland. Similar deportations took place in Latvia, Estonia, and other parts of the Soviet Union (see Soviet deportations from Estonia and population transfer in the Soviet Union). Lithuania observes the annual Mourning and Hope Day on June 14 in memory of those deported.
Document 11: Number the Stars: Number the Stars (1989) is a work of historical fiction by American author Lois Lowry, about the escape of a Jewish family (the Rosens) from Copenhagen during World War II.
Document 12: Return from the Ashes: Return from the Ashes is a 1965 British drama film directed by J. Lee Thompson and starring Ingrid Thulin, Herbert Lom, Maximilian Schell, and Samantha Eggar. It is based on a novel by French crime writer Hubert Monteilhet, adapted for film by prolific screenwriter Julius J. Epstein. The novel would also serve as the source material for the 2014 German film "Phoenix", directed by Christian Petzold, though the latter film makes multiple changes to the book's elements and concerns itself solely with the plot to reclaim an inheritance.
Document 13: Ashes in the Snow: Ashes in the Snow is a World War II drama based on the best-seller "Between Shades of Gray" by Ruta Sepetys.
Document 14: Ashes and Snow: Ashes and Snow by Canadian artist Gregory Colbert is an installation of photographic artworks, films, and a novel in letters that travels in the Nomadic Museum, a temporary structure built exclusively to house the exhibition. The work explores the shared poetic sensibilities of human beings and animals. "Ashes and Snow" has traveled to Venice, New York City, Santa Monica, Tokyo, and Mexico City. To date, "Ashes and Snow" has attracted more than 10 million visitors, making it the most attended exhibition by a living artist in history.
Document 15: Between Shades of Gray: Between Shades of Gray, a New York Times Bestseller, is the debut novel of American novelist Ruta Sepetys. It follows the Stalinist repressions of the mid-20th century and follows the life of Lina as she is deported from her native Lithuania with her mother and younger brother and the journey they take to a labor-camp in Siberia. It was nominated for the 2012 CILIP Carnegie Medal and has been translated into more than 27 languages.
ground_truth: Between Shades of Gray