Father Donald Calloway, MIC, a convert to Catholicism, is a member of the Congregation of the Marian Fathers of the Immaculate Conception. Before his conversion to Catholicism, he was a high school dropout who had been kicked out of a foreign country, institutionalized twice, and thrown in jail multiple times. After his radical conversion, he earned a B.A. in Philosophy and Theology from the Franciscan University of Steubenville, Ohio; M.Div. and S.T.B. degrees from the Dominican House of Studies in Washington, D.C.; and an S.T.L. in Mariology from the International Marian Research Institute in Dayton, Ohio. In addition to Under the Mantle: Marian Thoughts from a 21st Century Priest (Marian Press, 2013), he has written No Turning Back: A Witness to Mercy (Marian Press, 2010), a bestseller that recounts his conversion story. He also is the author of Purest of All Lilies: The Virgin Mary in the Spirituality of St. Faustina (Marian Press, 2008). He introduced and arranged Marian Gems: Daily Wisdom on Our Lady (Marian Press, 2014). He is the author of the international bestseller Consecration to St. Joseph (Marian Press, 2019); co-author of Consecration to St. Joseph for Children and Families (Marian Press, 2022); and author of the acclaimed graphic novel The Chaste Heart of St. Joseph (Marian Press, 2023). Further, he has written academic articles and is the editor of The Immaculate Conception in the Life of the Church (Marian Press, 2004) and The Virgin Mary and Theology of the Body (Marian Press, 2005). Father Calloway is the Vicar Provincial and Vocation Director for the Mother of Mercy Province. is a husband and a father. He holds a master's degree in education from the Franciscan University of Steubenville, Ohio. He has authored or co-authored fourteen books, including Parents of the Saints, Nursery of Heaven (co-author), The Shepherd at the Crib and the Cross, Courtship of the Saints, The Grief of Dads (co-author), Go and Fear Nothing, Our Lady of Sorrows, The Truth about Hell (co-author), Saints Come in All Shapes and Sizes, Virtues of the Saints (co-author), Sacred Heart of Jesus, The Most Powerful Saints in Exorcisms (co-author), and Humility of the Saints. He is a contributor to Fr. Donald Calloway's book, 30 Day Eucharistic Revival (Marian Press, 2024), and co-author with Fr. Calloway of Virtues of the Saints: 15 Heavenly Habits for Children (Marian Press, 2025). Find out more at patrickrohearn.com. Ann Kissane Engelhart is an accomplished watercolor artist, illustrator, and educator. The Lamb of God is her twelfth illustrated book. She previously collaborated with Patrick O'Hearn on Go and Fear Nothing. Ann illustrated The Light of Christmas Morning by Susan Bellavance, and has worked with Amy Welborn to produce the children's books Friendship with Jesus, Be Saints!, Bambinelli Sunday, and Adventures in Assisi. She collaborated with Nancy Brown and Regina Doman on The Chestertons and The Golden Key, and again with Nancy Brown on The Chestertons and the Top Meadow Troupe. She worked with Donna-Marie Cooper O'Boyle on Our Lady's Message to Three Shepherd Children and the World and Christmas Joy with Grandma! (Marian Press, 2022). Her portraits, still-lifes, and landscape paintings are featured in galleries and private collections. Ann lives in New York with her husband and has two grown children.