The author of the children's book series "Harry Potter" is J.K. Rowling. She introduced readers to the magical world of Hogwarts, profiled unforgettable characters like Harry, Hermione, and Ron, and crafted a narrative that blends elements of fantasy, adventure, and friendship. Since the first book, "Harry Potter and the Philosopher's Stone" (or "Sorcerer's Stone" in the U.S.), was published in 1997, the series has gained immense popularity, leading to multiple adaptations, merchandise, and a dedicated fanbase. Rowling's work has not only entertained millions of readers but has also sparked interest in reading among children and young adults worldwide.