Guardian

Riane Arvid is a Temporal Enforcer -- a superhuman cop from the future sworn to protect the innocent from time-traveling criminals. But when a group of murderous fanatics called the Xeran trap Riane in the year 2009, the only person she can turn to is a handsome twenty-first century warrior with mysterious origins... Nick Wyatt has abilities that have made him a target of the Xeran for his entire life -- preventing him from emotionally connecting with anyone. In Riane, he finally finds someone who can hold her own in his dangerous life, but he's not sure that the sexy time traveler is as open as she seems. In an attempt to discover each other's true intentions, both Riane and Nick decide seduction is the best tactic. But as the Xeran threaten both of their lives, their only chance at survival is to learn to trust each other...