Times Secret

After her father's death, Elayne discovers she's a Cyborg and returns to the past to take the place of a human dead girl. When the government discovers her missing, a tracker is sent in a time craft to bring her back.
The tracker, Katch, finds the beautiful android and falls in love with her. Twists, turns and intrigue keep them busy,
but they have plenty of time for love. The story continues in sequels, Time over Time, Timeless Love and Keeper of Her Heart.