Roald Dahl children's novels in a survey published by "School Library Journal", a monthly with primarily US audience. The Top 100 included four books by Dahl, more than any other writer: "Matilda", "Charlie and the Chocolate Factory", "The Witches", and "The BFG". In 2012, Dahl was among the British cultural icons selected by artist Sir Peter Blake to appear in a new version of his most famous artwork – the Beatles' "Sgt. Pepper's Lonely Hearts Club Band" album cover – to celebrate the British cultural figures of his life he most admires. In a 2017 UK poll of the greatest authors, songwriters,
Roald Dahl Theo Dahl was severely injured when his baby carriage was struck by a taxicab in New York City. For a time, he suffered from hydrocephalus. As a result, his father became involved in the development of what became known as the "Wade-Dahl-Till" (or WDT) valve, a device to alleviate the condition. The valve was a collaboration between Dahl, hydraulic engineer Stanley Wade, and London's Great Ormond Street Hospital neurosurgeon Kenneth Till, and was used successfully on almost 3,000 children around the world. In November 1962, Dahl's daughter Olivia died of measles encephalitis, age seven. Her death left Dahl "limp with