Question: Both the movie Pippi on the Run and the character Pippi Longstocking , are based on books by what author?

Context paragraphs:
Pippi on the Run: Pippi on the Run (original title: "På rymmen med Pippi Långstrump") 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 1977.

The New Adventures of Pippi Longstocking: The New Adventures of Pippi Longstocking is a 1988 American fantasy–adventure–musical film written and directed by Ken Annakin based on the books of the fictional character Pippi Longstocking, created by children's book author Astrid Lindgren.  While the title suggests a continuation of previous entries, the film is in fact a remake of the original story.  It was filmed in Fernandina Beach on Amelia Island and at soundstages in Jacksonville, Florida.  It was released in movie theaters worldwide in 13 languages by Columbia Pictures.

Sjörövar Fabbe: 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".

Pippi Longstocking (1949 film): Pippi Longstocking (orig.  "Pippi Långstrump") is a 1949 Swedish film directed by Per Gunvall and starring Viveca Serlachius as Pippi Longstocking.  It is based on the famous children's novel of the same name by Astrid Lindgren.

Kaka Ferskur: Kaka Ferskur (Fresh Rolls) or The New Adventures of Pippi Longstocking is a 1988 film written and directed by Todd Hughes.  "Kaka Ferskur" satirizes coming of age from a "Pippi Longstockings" view.  The movie shows the characters either as young adults or real adults who won't grow up.  In this film, men often play female roles, with squeaky voices dubbed over the men's voices.  Pippi Longstocking is played by comic Walter Barnett.

Pippi in the South Seas (book): 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.

Pippi Longstocking: Pippi Longstocking (Swedish: "Pippi Långstrump") is the main character in an eponymous series of children's books by the Swedish author Astrid Lindgren.  Pippi was named by Lindgren's daughter Karin, then nine years old like Pippi, who asked her mother for a get-well story when she was off school.

Pippi Longstocking (1969 TV series): Pippi Longstocking (Swedish: "Pippi Långstrump" ) is a TV series based on Astrid Lindgren's Pippi Longstocking children's books.  The show ran for thirteen episodes, the first episode being broadcast 8 February 1969 on the then Swedish public service channel SVT.

Pippi Longstocking (1969 film): Pippi Longstocking (original Swedish title: "Pippi Långstrump") is a 1969 Swedish movie, based on the eponymous children's books by Astrid Lindgren with the cast of the 1969 TV series "Pippi Longstocking".

Tami Erin: Tamara Erin Klicman (born July 8, 1974), known professionally as Tami Erin, is an American actress, model, singer, and fashion designer.  She is best known for her starring role as Pippi Longstocking in the Columbia Pictures movie "The New Adventures of Pippi Longstocking".

Supporting paragraphs: Pippi on the Run Pippi Longstocking
Answer: Astrid Lindgren