The genius of Nigel Warburton's Free Speech lies not only in its extraordinary clarity and incisiveness. Just as important is the way Warburton addresses freedom of speech - and attempts to stifle it - as an issue for the 21st century. More than ever, we need this book. Denis Dutton, University of Canterbury, New Zealand Crisp, clear and astute, this is a thought-provoking introduction to one of the most hotly contested questions of our time. Lisa Appignanesi, President English PEN