It tells the story of Kati, who travels, first to America, then to Italy and Paris.
The novels were translated into many languages including English, German, Spanish, French and Russian.
Peter does not want to experience the same and decides not commit to any woman, but that changes when he meets Eve.
In New York, Kati meets Mr Bates who lost his cook and his maid.
Through Mr Bates' daughter Marion meets Kati Bob, with whom she travels through America.
When Kati sees how black people are being treated in America, she is shocked.
Some of Kati's new friends believe that the white race needs to maintain their supremacy.
In New York, Kati meets Bob for the last time before heading home to Sweden.
When Kati and Eva win 3,000 crowns, they decide to travel to Italy.
The two make a beautiful gondola ride, but they lose each other in the crowd in the piazza and can not find each other again.
Although Kati thinks she has lost Lennart forever, she believes that he is her true love.
After their wedding, Eva, Lennart and Kati travel through Paris together and take a closer look at the city.
At Café Flore they meet Peter Björkmann, a rich business man from Sweden.
He tells Kati that he is still in love with Eva, because she is giving him the diversity and change he is longing for.
Peter decides not to visit Lennart and Kati any longer because he could meet Eva there.
In 1949 Astrid Lindgren was asked by a publisher of Bonniers to write a series of travelling stories for the magazine Damernas värld.
The stories, which were originally meant for grown-ups, were changed into a set of three girl novels.
A critical section on Catholic customs was removed in the girls books, as well as some interactions between Kati and her aunt and some landmarks during the journey through southern France.
A white taxi driver explained: "A good negro is a negro, that is five feet under ground" (en bra neger, det är en neger som ligger fem fot under jorden).
Astrid Lindgren was shocked and her protagonist Kati experiences similar things.
[7] In an exchange of letters with a reader, Astrid Lindgren explains she did not really feel like Kati at the age of 19 or 20.
[8][9] Jörg Bohn explains that the books were still listed as "exciting, refreshingly unconventional and timelessly modern" at the time of publication, but now there are a little out dated.
[4] Fredrik Sonck believes that the series is primarily interesting as a document of the time, and is worth reading on account of Lindgren's use of language.
Her protagonist Kati is shocked about the racial segregation and the way black people were threatened.
[10] Gabrielle Cromme praises that Lindgren's Kati series does without any "pedagogical intervention".
[11] Jana Mikota adds that the Kati series don't correspond with "the traditional understanding of girls literature".
The readers meet young women who are interested in literature, history and politics.
[12] Birgitta Theander loved the huge joy of life the books represent.
She thinks that within the books the reader gets closer to Kati's personal emotional life.
The love story in Kati is "pardon, madness and bliss" ("den är hänryckning, kval och salighet").