The longest novel in the world is Harry Potter and the Sorcerer's Stone. This is a fantasy novel series by the British K Rowling, a total of seven books, about an orphan Harry Potter on his 11th birthday found out that he was a wizard and was taken to Hogwarts School of Witchcraft and Wizardry to learn magic. The entire series contains a large number of magical elements, adventure plots, friendship stories, and love stories. The reader base covers readers of all ages and has a wide readership and high ratings on a global scale.