The disturbing post-apocalyptic novel The Chrysalids by John Wyndham, author of The Day of the Triffids and The Kraken Wakes and dramatised on BBC Radio 4. David Strorm's father doesn't approve of Angus Morton's unusually large horses, calling them blasphemies against nature. Little does he realise that his own son, and his son's cousin Rosalind and their friends, have their own secret abberation which would label them...