Marta Breen is a nonfiction author with a number of publications to her name. Among other things, she has written the story of women in Norwegian music, Born Feminist,and the bestselling 60 Women You Should Know About, in collaboration with illustrator Jenny Jordahl. They have also worked together on the book The F Word, which won the Norwegian Ministry of Culture's textbook prize for young people.

Jenny Jordahl is a prizewinning illustrator and cartoonist who runs the comic strip blog Livet blant dyrene (Life Among the Animals). She has illustrated several books with Marta Breen, among others. Jordahl debuted as an author with the picture book Hannemone and Hulda in 2017.