The purpose of this study was to find out how gender roles are described in two popular children’s detective stories, one of them written in 2002 and the other in 1946, to be able to compare the two. In order to do this, I used a qualitative research method in which I read and analyzed the text and illustrations of the books out of a gender perspective.I used gender theories describing how stereotypical gender roles are displayed, and these theories were later associated with the books I studied. I also used previous research concerning gender roles in other children's books in order to compare those results with my own.After having read, analyzed and compared the two books, I found vast resemblances between them, but also certain differences. However, it is obvious that the gender roles in both books for the most part are traditional. It is mainly the girls (although not the adult women) that diverge from the stereotypical gender roles, but this is also what is most common and most acceptable in today's society.