Wolfen Time

All that separates them...is a century or two. Werewolf Rafe Garrett is second-in-command of a twenty-third century special ops team, sent back to present day Seattle to stop a group of renegade vampires from destroying the U. S. and causing the deaths of millions of innocent people. He has a personal vendetta, too. The renegades' leader is the same bloodsucker who murdered Rafe's pregnant wife. Few humans can stake a vampire on their first try, but Stacy Cadell is that kind of gal - a ball of fire in a cool, petite package.
Caught in the battle between vampires and werewolves, Stacy hides her true identity from both sides, fearing it could be used against her. But protecting her heart from the werewolf warrior with the killer good looks, is a fight she's sure to lose. Especially when she learns that, for history to correct itself, she must sacrifice the one person she holds most dear. Contains: Hunky, alpha werewolves running around naked, sensual love scenes and mature language.
If you read sweet romance, try CRAZY FOR COWBOY, or one of the novels in the 'Frost Family & Friends' series.