Running Out of Time — Cheryl Norman

When Stacy Webber travels to Germany for her best friend's wedding, she loses more than her luggage and purse. She lands in a different time, fifty years ago, with no idea how to return to her world. The only people who speak her language are suspicious military personnel who either want to arrest her or commit her to a mental hospital. MP Sergeant Douglas “Brad” Bradley, charged with keeping Stacy in custody, doesn't know whether she is a clever Soviet spy or a victim of brainwashing. In spite of her wild claims of being from the future, he knows she's no time traveler. She's a beautiful young woman who seems genuinely vulnerable, but it could be part of an espionage act. Brad can't decide whether to handcuff her or kiss her. When Stacy figures out the purpose behind her jump through time, she faces a difficult and dangerous decision. Can she sacrifice her future to save Brad's before it's too late?