In this slim volume, Vincent GrĂ©goire undertakes to tell the story of Marie de lâIncarnation, renowned seventeenth-century mystic and founder of the Ursulines in French North America, as a âfemme forteâ who surmounted obstacles both social and religious to become âla premiĂšre missionnaire française en AmĂ©rique du nordâ (p. 14). Organized around the theme of obstacles, GrĂ©goireâs book advances an interpretation of Marie de lâIncarnation as an active woman, an agent determined not to shrink before challenges but to overcome them. Adversity, argues GrĂ©goire, was Marieâs daily bread, but âlâobstacle a fait Marie, nâayant pu la dĂ©faireâ (p. 23). Following an introductory chapter in which he locates Marie and the Ursulines within the context of post-Tridentine Catholicism and early modern missionary movements, GrĂ©goire proceeds to interrogate five different sorts of obstacles that gave shape to Marieâs religious vocation, each explored in its own chapter: demonic temptation; the perilous transatlantic journey of 1639; her maternal obligations towards the son she abandoned for religious life; cultural and linguistic barriers to teaching in New France; and conflicts with her male ecclesiastical superiors. Throughout, GrĂ©goire gives due attention to Marieâs agency, her determination in the face of challenges, her persistence in surmounting them, and her creativity in refiguring them as opportunities to suffer in imitation of Christ. Given the ways in which Marie (as GrĂ©goire affirms in the chapter on âLe Fils sacrifiĂ©â) interpreted her own life as one lived in subordination to the uncompromising will of God, one does wonder whether Marie would recognize the portrait constructed here â not that it matters to the validity of GrĂ©goireâs interpretation. Readers both new to Marie de lâIncarnation and familiar with her will find much in GrĂ©goireâs study of interest, including a provocative analysis of Marieâs live sense of demonic presence (which is often elided in studies of this Ursuline mystic) and a thorough analysis of her conflicts with Jesuit Father Vimont and Bishop François de Laval over the rules governing the Ursulines of Quebec. Unsurprisingly, given the brevity of the study, GrĂ©goire passes over some aspects of Marieâs biography too quickly and leaves open and unresolved some promising lines of enquiry. For instance, he tantalizingly notes (as have many before him) that, once in New France, Marie no longer experienced demonic assaults and her mystical experiences waned in intensity, while at the same time acknowledging that for Marie, and others of her time, New France was considered âune terre essentiellement sous lâinfluence du diableâ (p. 49) and the Iroquois believed to be instruments of the devil. ÂExactly how â and to what degree â Marie (and her French, Catholic counterparts in New France) assimilated Indigenous Americans to the devil is worth more analysis than GrĂ©goire gives it here, but perhaps one of the yields of a book like this is to stimulate future research.