Lovelock, a most unusual scientist, tells us of his childhood and an apprenticeship that led him directly to a life of science. After twenty years of medical research, he chose to work independently at home. This strange way of life succeeded beyond his dreams and it was his invention of the Electron Capture Detector, the most sensitive chemical detector of its time, that told us pesticides and other harmful chemicals were everywhere and that we were polluting on a global scale. His discovery that CFCs were accumulating in the Earth's atmosphere led to the realization that the ozone layer was in danger. Most important of all was his persistent quest for Gaia, a revolutionary idea that has changed forever the way we see the Earth.