A close colleague eulogized Grace Holmes Carlson (1906–1992) by declaring that “there was nothing run-of-the-mill about” this “fierce woman” (p. 225). In this welcome addition to the recent burst of work on the religious Left, Donna T. Haverty-Stacke meticulously explores how Carlson's Minnesota working-class origins and Catholic schooling first propelled her to a dynamic twelve-year career in the Twin Cities Trotskyist movement and then shaped her abrupt apostasy and return to the church, where she refashioned herself as a Christian Marxist feminist. Grounded in letters, interviews and, unsurprisingly, Federal Bureau of Investigation surveillance material, the book illuminates the development of working-class and leftist feminisms between that movement's first and second waves and highlights the importance of personal relationships in sustaining radical commitment and activism. After attending a Catholic college, Carlson earned a Ph.D. in psychology at the University of Minnesota in 1933, where she was also exposed to depression-era left-wing...