Ancient Enemy Series by Vijaya Schartz

The Anaz-voohri have returned from the stars after eight hundred years, to claim the planet of their ancestors... a blue orb named Earth. Since he witnessed the abduction of his baby sister by an alien creature, Zack will stop at nothing to rescue her, even if it means joining the Special Forces. But Tia Vargas, the Amazon training the secret unit has no use for this handsome, rebellious recru

The year is 2023, and an alien invader has infiltrated the human race. In a dangerous future threatened by aliens and infiltrated by hybrids, archeologist Celene Dupres witnesses her father's murder. Vowing to avenge him and retrieve his precious alien relics, she finds the perfect ally and protector. But the man she trusts, the man with whom she is falling in love, is the secret agent sent to kill her. Kin, however is more than a killing machine... moreThe year is 2023, and an alien invader has infiltrated the human race. In a dangerous future threatened by aliens and infiltrated by hybrids, archeologist Celene Dupres witnesses her father's murder. Vowing to avenge him and retrieve his precious alien relics, she finds the perfect ally and protector. But the man she trusts, the man with whom she is falling in love, is the secret agent sent to kill her. Kin, however is more than a killing machine. Despite his love for Celene, can he accomplish his gruesome mission, and save humanity from the threat embedded in her DNA? less

Dr. Melissa Campbell, researcher at the San Francisco Center for Disease Control, requests help to protect her precious vaccine, one that could end the deadly alien plague. She didn't expect a crazy renegade like Bennett for a bodyguard. She hates military types, and this genetically enhanced super-soldier is pure testosterone, hot-headed, quick-tempered, impulsive, and downright impossible. But these are dangerous times with riots in the streets, and rumors of alien invasion... moreDr. Melissa Campbell, researcher at the San Francisco Center for Disease Control, requests help to protect her precious vaccine, one that could end the deadly alien plague. She didn't expect a crazy renegade like Bennett for a bodyguard. She hates military types, and this genetically enhanced super-soldier is pure testosterone, hot-headed, quick-tempered, impulsive, and downright impossible. But these are dangerous times with riots in the streets, and rumors of alien invasion. In a breathless race against time, experience the decisive battle for humankind, one that will decide whether Earth belongs to humanity, or to a powerful alien race.. less