Alex Goodenough was the cleverest kid in his school - so why didn't he get a sixth form place? Decca Aitkenhead talks to his family about the impact of Asperger's

When Alex Goodenough was 13, his English teacher asked his class to write the first chapter of a novel. Alex began writing his, and after chapter one he thought he might as well carry on. He kept writing and writing - about space-faring aliens killing each other - and when the day came to submit his work, he handed in 97,000 words. An entire novel.