I first had the pleasure of meeting the force of nature that is Abby Day back in 2010 at the Non-religion and Secularity Research Network’s “Qualitative Methods Workshop” at the University of Cambridge (Cotter 2011). Back then I was working toward my Master’s degree in Religious Studies and had little idea that in the coming years we would end up co-editing a book with Giselle Vincett (Day et al. 2013) or that I would find myself reviewing Believing in Belonging (see Cotter 2013) and collaborating on projects such as the one appearing in this journal. Given that the essays that follow this editorial introduction—from Grace Davie, James A. Beckford, Saliha Chattoo, Mia Lövheim, Manuel A. Vásquez, and Abby Day herself—engage extensively and thought-provokingly with Abby’s work, I am going to restrict my comments to two brief points. The first concerns the connections that I can see between Believing in Belonging and the growing body of research into ‘non-religion’. The second includes some reflections on the place of Abby’s work in the critical academic study of ‘religion’ more broadly.