Unknown to Humanity, the descendants of fallen angels live among us, but a serial killer has discovered their secret... FBI Agent Michael Childs is investigating a series of grisly murders in New York City, where the only link between the victims is that they were all born with twelve fingers and twelve toes. In occult circles, they are known as the Nephilim. When Michael gets too close to the truth, he uncovers his own unique heritage and finds himself at the top of the killer's list. A break in the case leads to Anaba Raines, a Marine Corps sniper listed as killed-in-action, however Michael finds the soldier alive and well, but no longer human. She's a Nightmare, a warhorse forged from a damned soul and trained to infernal purpose. As the boundaries of mythology and biblical lore collide with his reality, Michael is forced to confront an apocalyptic calling, or die trying. "Jackson modernizes Christian lore in her action-packed debut... urban fantasy fans will be happy to charge through to the end." - Publishers Weekly "A brilliantly plotted, hard-hitting fantasy deeply rooted in the myths of the human, the divine, the angelic, and the equine." -Nancy Springer, author of The Ebola Holmes Mysteries