This series looks at the development of scientific thought and discovery through the lives and achievements of some of the world's great scientists. The book follows the life of Marconi and shows how his work as a pioneering physicist and inventor helped to establish radio communications. Marconi's passion for experiment with electricity and sound are described and it is this which led him to the invention of the first practical system of wireless telegraphy. The book shows how Marconi, with determination and vision, developed his early success in transmitting messages over a short distance without wires into a world-wide system of radio communication. Illustrations help to explain the nature of radio waves to the young reader.