Behind every punctuation mark lies a thousand stories. The punctuation of English, marked with occasional rationality, is founded on arbitrariness and littered with oddities. For a system of a few dozen marks it generates a disproportionate degree of uncertainty and passion, inspiring organisations like the Apostrophe Protection Society and sending enthusiasts, correction-pens in hand, in a crusade against error.

Professor Crystal leads us through this minefield with characteristic wit, clarity and commonsense. He gives a fascinating account of the origin and progress of every kind of punctuation mark over one and a half millennia, and he offers sound advice on how punctuation may be used to meet the needs of every occasion and context.