September is the name of the girl who is the main character in the bestselling "Fairyland" series of children's novels published by author Catherynne M. Valente since 2011. The first book in this series, "The Girl Who Circumnavigated Fairyland in a Ship of Her Own Making", was mentioned in Valente's adult fantasy novel "Palimpsest" (2009) as a book the character November had read as a child. She then wrote the children's book as a crowd-funded project. This was a hit and spawned the best-selling series. https://www.newyorker.com/books/page-turner/a-wildly-inventive-fantasy-series-that-began-on-the-web-and-became-a-best-seller
"September is the artist name of Swedish singer Petra Marklund, born 1984.In 2003, at the age of 18, she had her first hit in Sweden with La La La (Never Give It Up). This was followed by We Can Do It (2003), September All Over (2004), Satellites (2005) and Looking For Love (2005).She is now preparing to release and promote her music in over 50 countries, starting with the single Satellites later this year.On October 21 2006, Satellites peaked at number 8 on the Billboard Hot Dance Airplay chart in the United States." - Wikipedia.
https://www.newyorker.com/books/page-turner/a-wildly-inventive-fantasy-series-that-began-on-the-web-and-became-a-best-seller