This book of twenty-one essays arises from a conference on revivalism to mark the centenary of the Welsh revival of 1904–5. Some two-thirds of contributors deal with that remarkable phenomenon in Wales and its consequences elsewhere, with others examining the revivalist tradition in Wales from the eighteenth to the nineteenth centuries. There are sound scholarly contributions on the eighteenth century by Mark A. Knoll (on hymnody), Eryn White (on Methodist renewal), John Morgan Guy (on Methodism and the established Church) and David Ceri Jones (on the promotion of international revivalism). There is a model study by David Bebbington on the 1859 revival in a Scottish town. However, taken as a whole, the book is somewhat uneven. The chapters on the 1904–5 revival are a mixed bag and in some cases lack a sense of proper historical contextualisation or familiarity with how the event has been interpreted by recent social historians. As a result, it is not always clear whom the book is addressing. Exceptions to this are the valuable chapters by Daniel Boucher (on the Pietism of Welsh Evangelicalism) and John Harvey (on the religious ‘visions’ of 1904–5). Some contributors fruitfully explore Scottish revivalism, and there are chapters on Ugandan revivalism. A more rigorous editorial selection would have made this a stronger publication. As it stands, the book demonstrates the strength of scholarship on pre-twentieth century revivals and reveals the need for more thorough scholarly treatments of 1904–5 that would bear comparison with the studies of the earlier periods. Among the themes requiring further systematic examination are the role of youth and gender in the events of 1904–5 and the impact of that revival on French Protestantism.