Joining from the island of Bryher in the Scillies, the setting for many of his books, the author talks to Julia Eccleshare about his new book, published to celebrate 80 years of Puffin Books and inspired by his father-in-law, Allen Lane, founder of Penguin. This is a magical story about how one stormy night changed a whole life. Julia Eccleshare is Children's Director at Hay Festival.