Matthew, they thought, was just going through a phase of talking to himself. And, like many parents, they waited for him to get over it, but it started to get worse. Mathew's conversations with himself grew more and more intense - it was like listening to one end of a telephone conversation while someone argued, cajoled and reasoned with another person you couldn't hear. Then Matthew started doing things he couldn't do before, like counting in binary-code mathematics. So he told them about Chocky - the person who lived in his head.
John Wyndham Parkes Lucas Benyon Harris was born in 1903, the son of a barrister. He tried a number of careers including farming, law, commercial art and advertising, and started writing short stories, intended for sale, in 1925. From 1930 to 1939 he wrote stories of various kinds under different names, almost exclusively for American publications, while also writing detective novels. During the war he was in the Civil Service and then the Army. In 1946 he went back to writing stories for publication in the USA and decided to try a modified form of science fiction, a form he called 'logical fantasy'. As John Wyndham he wrote The Day of the Triffids and The Kraken Wakes (both widely translated), The Chrysalids, The Midwich Cuckoos (filmed as Village of the Damned), The Seeds of Time, Trouble with Lichen, The Outward Urge (with Lucas Parkes) and Chocky. He died in March 1969