The term ‘masterpiece’ is often used lazily as a bit of instant praise, but the dictionary definition is actually ‘a production surpassing in excellence all others by the same hand’. So, strictly, you can only produce one masterpiece. Cyril Connolly (1903-1974) may have had this on his mind when he began his book The Unquiet Grave: ‘The more books we read, the clearer it becomes that the true function of a writer is to produce a masterpiece and no other task is of any consequence.’ He, alas, never produced a major work to earn the distinction himself, and he will mainly be remembered as the founder (with Stephen Spender) of the literary magazine Horizon and as the principal book reviewer of the Sunday Times in the period after the Second World War.