Roald Dahl, 1916-1990, Britain's best selling author of children's books like "Charlie and the Chocolate Factory" and "James and the Giant Peach," is known for his children's stories, but he led an adventurous early life as biplane pilot in Africa, RAF fighter pilot in WWII, and British intelligence agent. His daughter Ophelia and his second wife, Felicity Crosland Dahl, recall Dahl's family and writing life at Gipsy House in Great Missenden, England....