Faith on the Margins is a fascinating study of Dutch Catholicism that traces the fate of this confessional community from the late sixteenth century up through the Jansenist schism of 1702. The focus of Parker's book is the Holland Mission, a cooperative effort between the clergy and the laity to restore the fortunes of the Roman Church. His analysis broadens our understanding of religion both in Netherlands and more generally across early modern Europe in two significant ways. First, his examination of Dutch Catholicism is an important case study of how a minority faith was able to survive and even grow on society's margins in a repressive environment. Parker effectively critiques a simplistic but celebrated view of an open and tolerant Dutch society that has frequently informed our understanding of this region in the seventeenth century. He argues that religious coexistence in the United Provinces developed in a context of both conflict and concord. Second, Parker illustrates how Catholic reform in Netherlands occurred without the support of either the state or an officially recognized church. Instead, it was the product of a unique form of collaboration between an active clergy and a committed laity. Parker describes how elite families helped create a new infrastructure to support the clergy and care for the poor after the secularization of church property. Women, in particular, played an especially critical role as the Catholic Church worked to reestablish itself in Dutch culture.