The Harry Potter books were fabulously successful upon their publication. Most readers like an unlikely hero, and Harry, with his broken glasses, skinny frame, and late learning about the wizard world, is such a hero. He succeeds as a result of his enthusiasm, courage, and good friends. These are all positive traits that any reader can understand and desire. Because Harry's relatives undervalue his complex and companionable personality, we are satisfied when he triumphs over people and creatures more powerful than he. Harry is a quirky, unlikely hero.
J.K. Rowling's series of adventures touches the common children's fantasy that another world coexists with our own. The Harry Potter books describe us as Muggles, non-magical people who live our entire lives oblivious to the existence of wizards. The novels allow us to envision a magical world that we are otherwise unable to see. The attitude of wizards toward Muggles is usually tolerant and humoring. The book blurs the boundary between real life and fantasy. Even if there were wizards in our world, we, as Muggles, wouldn't know about them.
Rowling's world offers something to everyone. The novel contains all the elements of adventure stories, including monsters, magic, sports, and miracles. But it also resembles a detective story. The masterminds in the books are all clever, and they are never who they seem. Furthermore, the books familiarize Hogwarts, the magic school that Harry attends. Children can understand and sympathize with the environment of Hogwarts. Gradually, all of the extraordinary aspects of the school become unsurprising, and Hogwarts resembles any child's school where all things are connected and everything is contained. Harry is an ordinary boy who experiences the complexity of growing up, and yet we are able to see this process against an enchanting and vivid new background.
Harry Potter and the Goblet of Fire expands the magical world beyond Hogwarts and Britain, through the International competitions of the Quidditch World Cup and the Triwizard Cup. It also confirms that, while Harry has held Voldemort temporarily at bay in the previous books, Voldemort will return again, and the wizard world will have to reckon with this bleak certainty. Each book in the Harry Potter series addresses a different social issue. The first book takes a stand against the pursuit of immortality. The second book speaks against racism and family privilege. The third book discusses the injustices of poor legal systems. This book combats enslavement, both of house-elves and of good wizards.