Question: What is the title of one of Pippi in the South Seas writers books?
Context: Sjörövar Fabbe (English: "Pirate grandpa Fabian") is a Swedish shanty-style children's song originally written by Georg Riedel and Astrid Lindgren for the film "Pippi in the South Seas" ("Pippi Långstrump på de sju haven") in 1970.  The lyrics are about Pippi Longstocking's great grandfather Fabian "Fabbe" Longstocking who was a feared pirate captain on all seven seas.  The last line of the chorus "Tjo-hej hadelittan lej" is a fictional language.  The song was originally performed by Pippi Longstocking actress Inger Nilsson who published it in 1975 as B-side of the single "Här kommer Pippi Långstrump".  In 2001, it was covered as crossover version with the melody of Dio's "Holy Diver" by the Swedish metal band Black Ingvars.  Other Swedish versions are by Plura Jonsson in 1999, by Siw Malmkvist & Tove from 2003 and by Johanna Grüssner & Mika Pohjola who performed a jazz version of this song in 2006.  A Norwegian version with lyrics by Marit Trulsrud is by Anita Hegerland and Frank Cook from 1970.  There is also a German version called Seeräuber-Opa Fabian with lyrics by Helmut Harun.  It was first performed by actress Eva Mattes in 1970 and covered in 2012 by German singer Lena Meyer-Landrut for the compilation album "Giraffenaffen". A Son of the Sun is a 1912 novel by Jack London.  It is set in the South Pacific at the beginning of the 20th century and consists of eight separate stories.  David Grief is a forty-year-old English adventurer who came to the South seas years ago and became rich.  As a businessman he owns offices in Sydney, but he is rarely there.  Since his wealth spreads over a lot of islands, Grief has some adventures while going among these islands.  London depicts the striking panorama of the South seas with adventurers, scoundrels, swindlers, pirates, and cannibals. Douglas (hatched ca 1967) is the male scarlet macaw that played the parrot "Rosalinda" in the 1970 Pippi Longstocking movie "Pippi in the South Seas". South Seas Island Resort is a 330 acre resort located on the shores of the Gulf of Mexico in the community of Captiva on Captiva Island, in Lee County, Florida.  The original resort, South Seas Plantation, was opened in 1946 as a fishing resort by Clarence Chadwick, following a dry hurricane (salt-water storm surge kills the plants) which ended commercial farming on the island.  Chadwick owned much of Captiva and portions of nearby Sanibel, making his fortune inventing the Checkprinter in the 1920s.  His heirs sold the property to Mariner Properties in 1966, which began the modern era of the resort.  The original Plantation house, suffering from termites and wood rot, was demolished in the 1990s. Pippi in the South Seas is a 1948 sequel to Astrid Lindgren's classic children's books, "Pippi Longstocking" and "Pippi Goes on Board".  It is set sometime after the events of the original book and centers around Pippi's further misadventures and experiences, and the main protagonist's theory that the reason for her father's mysterious disappearance that he was hailed as king of an island of natives is confirmed as true. The South Seas Detachment (南海支隊 , "Nankai Shitai" ) of the Imperial Japanese Army was a brigade-size force formed in 1941 to be the army unit used in the Japanese seizure of the South Pacific island groups of Wake, Guam and the Gilberts.  As part of the South Seas Force, it fell under Imperial Japanese Navy command and control.  It was drawn from the 55th Division and was commanded by Major General Tomitarō Horii.  It consisted of the following units: Tabu: A Story of the South Seas, sometimes simply called Tabu (] ), is a 1931 silent film directed by F.W. Murnau, a docufiction.  The film is split into two chapters.  The first, called "Paradise", depicts the lives of two lovers on a South Seas island until they are forced to escape the island when the girl is chosen as a holy maid to the gods.  The second chapter, "Paradise Lost", depicts the couple's life on a colonised island and how they adapt to and are exploited by Western civilisation.  The title of the film comes from the Polynesian concept of "tapu" (spelled "tabu" in Tongan before 1943), from which is derived the English word "taboo." Pippi Goes on Board is a 1946 sequel to Astrid Lindgren's classic children's chapter book, "Pippi Longstocking".  It was followed by a further sequel "Pippi in the South Seas".  It was filmed in 1969 for a TV series and edited into a film in 1969. Astrid Anna Emilia Lindgren (born Ericsson; ] ; 14 November 1907 – 28 January 2002) was a Swedish writer of fiction and screenplays.  She is best known for children's book series featuring Pippi Longstocking, Emil i Lönneberga, Karlsson-on-the-Roof, and the Six Bullerby Children ("Children of Noisy Village" in the US), as well as the children's fantasy novels "Mio, My Son", "Ronia the Robber's Daughter", and "The Brothers Lionheart". Pippi in the South Seas (original title: "Pippi Långstrump på de sju haven") is a 1970 Swedish movie, based on the eponymous children's books by Astrid Lindgren with the cast of the 1969 TV series "Pippi Longstocking".  It was released in the USA in 1975.
Answer: "The Brothers Lionheart".