"I think it caught on because the stories that these four girls have individually in the book are extremely relatable. They’re very real teenage experiences. I think the friendship between the four girls is something that is more realistic than a lot of the relationships we see between girls in movies lately. A lot of the time it’s like backstabbing or petty or superficial. I think most girls’ relationships are real friendships like these. I don’t think they’re that much more dramatic."