Joanne K. Rowling's young adult book series Harry Potter is undoubtedly the most significant phenomenon in the children's and young adult book market of the last decade. The books unite millions of enthusiastic fans worldwide, who engage in a fan culture that is also reflected in the media and secondary markets. In addition to elaborate film adaptations, there are countless merchandise items, music CDs, video games, and more. The seven-part series breaks sales records while simultaneously posing puzzles for literary and media scholars. What is it that captivates readers of all generations about the young wizard? Various disciplines offer approaches to uncover the unique success and impact of the series. Against this backdrop, Silvia Himmelsbach contributes an interdisciplinary exploration of the appeal of the young adult book series.