‎'‎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