Sotheby’s director of the department of printed books and manuscripts Dr Philip Errington poses for photographers by holding a first edition copy of the first Harry Potter book “Harry Potter and the Philosopher’s Stone.” (AP/Matt Dunham)

According to the Journal of Applied Social Psychology, reading the fantasy series significantly improved young readers’ perception of stigmatized groups like immigrants, LGBTQ individuals, and refugees. The social psychology paper employed three studies, analyzing Italian fifth graders and high school students, as well as, British college students.

Read more from the study here.