'You're 82 years old. You've shrunk six centimetres, you only weigh 45 kilos yet you're still beautiful, graceful and desirable' - so begins Andr Gorz's 'open love letter' to the woman he has lived with for 58 years and who lies dying next to him. As one of France's leading post-war philosophers, Andr Gorz wrote many influential books, but nothing he wrote will be read as widely or remembered as long as this simple, passionate, beautiful...