Roald Dahl was a British writer best known for his wildly imaginative children's books, including Charlie and the Chocolate Factory, Matilda, and James and the Giant Peach. Before becoming a writer, he served as a fighter pilot during World War II, an experience that later shaped some of his storytelling. His playful, mischievous sense of humor and love of the fantastic made him one of the best-loved children's authors of all time.