"[A] compelling and original history...Faulkner's important argument and her useful, detailed accounts of compelling archival materials makes Unfaithful a welcome contribution to the study of women's history and social reform movements in the nineteenth-century US. Indeed, her keen sense of the connections that marriage reformers had with other important social reform movements of the time, including abolitionism, communitarianism, and women's suffrage, open many opportunities for future scholarship on the intersections of activism then and now. " (American Literary History) "Faulkner's Unfaithful is an engaging work, a compelling narrative replete with a colourful cast of characters. It does many things well, and scholars of the nineteenth century, particularly those who study gender, the law, and reform movements, will find it to be an important addition to their bookshelves…an important addition to current scholarship, enriching our understanding of long-studied nineteenth-century reform movements and the history of American marriage more broadly." (American Nineteenth Century History) "Unfaithful engagingly focuses on a set of progressives bent on delegitimizing loveless marriages at a time when lifelong indissoluble marriage was the deep-rooted norm. Carol Faulkner unearths a wealth of new detail about the personal lives of individuals struggling to recast patriarchy in intimate life and to promote new values of choice, love, and women's autonomy in the sexual realm." (Patricia Cline Cohen, University of California, Santa Barbara)