Angel Fire, by Mary Marshall, is a science fiction story with elements of religion, espionage, extra-terrestrial activities, prophecies, and mythology.

The story begins with Captain Sorn and the surviving crew members of his battleship, Lieutenant Ont Zejen and the android, Jennex, stranded and lost in space. While lingering in space, they encounter a space anormality and drive the ship through it. Upon exiting, they find themselves thousands of light years away from their home planet, Tethra, and are astounded to be looking at the legendary planet Earth.

After analyzing Earth from their hidden out-of-space location, Captain Sorn and Lieutenant Zejen decide to infiltrate the planet using the identities of Richard Saxon and Frank Nelson, respectively. Once adjusted to life on Earth, they will continue to study the planet, find parts to fix their ship, and go back home.

Once on Earth, Jennex will be their only contact with the ship. The android will stay on board repairing and manning the ship, doing a further research on Earth, and transmitting relevant information to Richard and Frank.

While gathering data one day, Jennex discovers the Research Organization for the study of Extra-terrestrials (ROSET). It hacks into the organization's computer and becomes fully aware of the life-threatening danger ROSET represents to their safety and survival on Earth.

When Captain Sorn meets Selina Devon and Father John Fisk, a spiritual battle begins between the forces of good and evil on heaven and Earth. The Archangels and angels led by the Archangel Michael must protect Richard, Selina, and Fr. Fisk from the evil forces led by Natas, the demon. His evil doers will use all their wicked power and tricks to prevent the fulfillment of an ancient Tethra's prophecy.

Richard Saxon's encounters with ROSET's despicable operative and Natas' puppet Max Traytur will keep him and Selina alert and constantly on the run throughout the story.

Captain Sorn feels torn between two worlds. He must endure pain, loss, and rebirth to discover the truth. He also must grow in experience and knowledge to save his planet Tethra and his newly discovered home, Earth.

One of the biggest weaknesses of the story is its excessive similarity to famous science fiction programs such as Star Trek, Deep Space Nine, and Lost in Space. However, the vivid and grasping scenes involving Max Traytur will allow the reader to feel the pain this character inflicts onto others.

Angel Fire is a book for Catholics looking for an alternative to popular science fiction books. However, its aspects of religion might be, at times, too overwhelming for non-Catholics or readers sensitive to stories with religious content.