Sendak with his book Where the Wild Things Are at the International Youth Library in Munich, 1971Photograph: Keystone/Getty ImagesThe cover of Maurice Sendak's Where the Wild Things Are, which has sold over 17m copies since it was published in 1963Photograph: HarperCollins/APSendak poses with one of the monsters from his book Where the Wild Things Are, created for the operatic adaptation of the book in St. Paul, US, 1985Photograph: AP