<p>"<i>Disruptive Powers</i> deals with a myriad of themes in a complex, ambitious narrative based to a great degree on primary sources from numerous state and church archives…O’Sullivan gives us much to ponder in his thought-provoking, challenging work."</p> - Kevin P. Spicer, Stonehill College (<em>Contemporary Church History</em>) <p>"O’Sullivan’s wonderful study of early-twentieth-century German Catholic miracles<i>, Disruptive Power</i>, keeps social structures, clerical and lay leadership and institutions in view while also illuminating forms of popular piety and their political impact both within the Catholid community and at regional and national levels…Michael O’Sullivan has written a richly descriptive and carefully argued book that makes a serious and important contribution to a vibrant and expanding field."</p> - Monica Black, University of Tennessee (<em>German History</em>) <p>"O’Sullivan aptly demonstrates the ways in which power from below – grassroots movements as well as localized individual efforts – can influence and shape figures and events at regional and national levels. While his book will be of most interest to German studies scholars, his subject also has broad appeal to social and cultural historians of modern Europe."</p> - Lauren Faulkner Rossi (<em>German Studies Review</em>) <p>"O’Sullivan offers a compelling argument for reconfiguring the conventional narrative about piety and secularization in modern Germany."</p> - Lauren N. Faulkner Rossi (<em>Journal of Modern History, Vol.92, No. 4</em>) <p>"O’Sullivan’s book is fascinating reading, meticulously researched, and well written."</p> - Stephen Bevans, SVD, Catholic Theological Union, Chicago (<em>University of Toronto Quarterly: Letters in Canada 2018</em>) <p>"Michael E. O’Sullivan’s deeply researched, equally imaginative and provocative book <i>Disruptive Power </i>tells the fascinating story of Therese Neumann (1898–1962)."</p> - Benjamin Ziemann, University of Sheffield (<em>American Historical Review</em>) <p>"This beautifully written monograph deserves wide readership, especially by students and scholars of Europe and sexuality. Employing the case of Catholic mystic Therese Neumann, Michael O’Sullivan challenges conventional narratives about German history to argue for ‘the central place of Catholic miracles to the politics of modern Germany.’"</p> - Maria Mitchell, Franklin & Marshall College (<em>EuropeNow</em>)