Since 2015, Marie and Jean-Baptiste Maillard have devoted them-selves to the Lights in the Dark association, sharing Carlo’s spiritual vision.They honor his legacy through miraclesdecarlo.com, curate his exhibition of Eucharistic miracles on YouTube, and in 2018 established the Carlo Acutis Invisible Monastery—a digital sanctuary offering prayers for those they encounter online.They sat down with Carlo’s mother and others to write this beautiful, indepth biography of the young saint.