Non-fiction, this theological work by Jean Daniélou explores the role of angels in salvation history and Christian tradition. Drawing from Scripture, Patristic sources, and liturgical texts, the author outlines the functions and significance of angels as mediators between God and humanity. The book is structured to trace their presence from Creation to the Church, emphasizing their active participation in divine revelation and spiritual life. First published in 1998 (Italian edition), it remains a concise yet profound resource for readers interested in Christian theology, angelology, and spiritual doctrine.