Daughters of Twilight — Collette Jackson-Fink

An earthquake hits near the city of Waterloo, Iowa, caused by the sudden appearance of a gigantic black pyramid. Explorer teams organized by the military, FBI, local law enforcement, and bio Labs, whose objective is to create the perfect warrior. Dane Coles along with other members of a special tactical team and lead by Captain Ivan Steel. Partway in Dane's team is confronted by a band of mystic female creatures. A gunshot triggers a fury of movement and Dane chases their lead angelic warrior, Asia. She stops, confronts him, and soon overtakes him. She sees him as an enemy until she tastes his blood and finds him to be innocent. The angelic band allows the teams to leave but later, Asia visits Dane several times and soon a bond forms between them. Bio Labs needs this angelic creature and tries to use Dane to get her. Soon Dane finds that he has to choose between his love for this creature and his loyalty to his superiors.