An extraordinary collection of letters that documents the trans-Atlantic friendship and partnership of two astonishing women, one American, one German, who traversed two continents consumed in political turmoil which served as the background to their intertwined personal and political lives. As champions of women’s rights, abolition, and socialism, Mathilde Franziska Anneke and Mary Booth struggled to balance family life—including separations, marital frustrations, loss of children, illness—with political activism. The volume deepens our understanding of complex, loving same-sex relationships that buoyed the women emotionally and fulfilled them in ways their husbands did and could not. The entries also uncover the common ground shared by European radicals and American reformers and permit a glimpse at the American Civil War through the eyes of Europeans. Alison Clark Efford and Viktorija Bilic, the editors of this unique volume, are to be commended for making these important letters accessible to English-speaking audiences.