The Egyptian Underworld: The Book of Day, the Book of Night, and the Sacred Hours of the Duat invites readers into one of the most profound and symbolically rich visions of the ancient world. In Egyptian thought, the Duat was not simply the realm of the dead, but a hidden chamber of transformation, where the sun passed through darkness, the gods renewed creation, and the blessed dead moved toward restored life. Drawing on the sacred imagery of Ra, Osiris, Nut, and the great funerary traditions of ancient Egypt, this book explores the cosmic journey through the twelve hours of night, the mysteries of the Book of Day and the Book of Night, and the deeper theology of death, renewal, and divine time. Each hour reveals a world of gates, guardians, hidden waters, sacred beings, and celestial processes that illuminate how the Egyptians understood the passage from darkness to dawn. Blending myth, cosmology, and spiritual symbolism, Peta Oakes presents the Duat not merely as an underworld, but as a living map of rebirth, order, and eternal return. This is a journey through the unseen realm beneath the body of Nut, where night becomes the womb of renewal and where the rising sun stands as the triumph of life over dissolution.