Scars of Faith: Jesuit Letters from the Mariana Islands (1668-1684), the newest publication from the Institute of Jesuit Sources, presents a collection of primary sources related to Jesuit martyrdom in the Mariana Islands during the 17th century. Jesuit missionaries helping to spread Catholicism at the margins of the Spanish empire faced repression, persecution, and death. The primary sources in this volume are documents and letters, offered in their original languages and in English, from Jesuit missionaries such as Fr. Diego Luis de San Vitores, Fr. Luis de Medina, and Fr. Manuel de Solórzano y Escobar. These documents tell a gripping account of the Jesuits and their encounters with the people of the Mariana Islands, including the native Chamorro people. The volume was edited by Alexandre Coello de la Rosa (University Pompeu Fabra, Barcelona) and David Atienza (University of Guam). Jesuit Sources, which specializes in preserving, maintaining, and expanding for scholars around the world important texts and studies in Jesuit history, spirituality, and pedagogy, is housed at the Institute for Advanced Jesuit Studies at Boston College.