Nearly three decades after J.K. Rowling's "Harry Potter and the Sorcerer’s Stone" was published, and 13 years since the final film, "Harry Potter and the Deathly Hallows: Part 2," hit theaters, the magical world of Harry Potter is set to return in a new form: an HBO television series. The upcoming series, led by showrunner Francesca Gardiner and director Mark Mylod, known for...