Veins of Devotion details recent collaborations between guru-led devotional movements and public health campaigns to encourage voluntary blood donation in northern India. Focusing primarily on Delhi, Jacob Copeman carefully situates the practice within the context of religious gift-giving, sacrifice, caste, kinship, and nationalism. The book analyzes the operations of several high-profile religious orders that organize large-scale public blood-giving events and argues that blood donation has become a site not only of frenetic competition between different devotional movements, but also of intense spiritual creativity.