'makes the original 1818 text easily available, and there are good reasons for welcoming it ... Butler's introduction is a rich essay in historical contextualisation, emphasising the Shelleys' early links with materialist physiology and showing how the 1831 edition reflected the broad intellectual changes of the intervening years.' The English Association 'this edition is worth a browse' Daily Telegraph 'The excellent introduction discusses the circumstances of its writing in the wider context of social and scientific controversy.' Good Book Guide, January 1995