Genius' is an over-used, but rarely-accurate, description applied to remarkable figures. In the case of Richard Trevithick, however, its use is not only apt, but could even be regarded as something of an understatement. Philip Hosken's 'Genius' offers a perfect introduction to the great engineer. Combining detailed and original research, the result is a clearly stated, unbiased and readable account of his life and achievements. From childhood and early motivation, through feverish experimentation and frustration, to the eventual triumph of his revolutionary high pressure cylindrical boiler,...