Book excerpt: The Cascadia bioregion – British Columbia, Washington, and Oregon – has long been at the forefront of cultural shifts occurring throughout North America, in particular regarding religious institutions, ideas, and practices. Religion at the Edge explores the rise of religious “nones,” the decline of mainstream Christian denominations, spiritual and environmental innovation, increasing religious pluralism, and the growth of smaller, more traditional faith groups in Cascadia. This volume is the first research-driven book to address religion, spirituality, and irreligion in the Pacific Northwest, past and present. Employing surveys, archival sources, interviews, and focus groups, contributors showcase a spectrum of adherents from Christian, Sikh, Buddhist, Muslim, Jewish, Baha’i, New Age, Indigenous, and irreligious communities. Religion at the Edge expands our understanding of contemporary society, pursuing empirical and theoretical debates about the nature, scale, and implications of socio-religious changes in North America, and the relevance of regionalism to that discussion.