Countdown by Iris Johansen
This is a continuation of Blind Alley, which I reviewed some time ago and mentioned there were plenty of unanswered questions for another book. It is now four years later, Jane MacGuire is at Harvard, and during an attempt to kidnap her, her childhood friend is killed. Then Mark Trevor shows up out of nowhere and convinces her to return to Scotland with him so he can protect her. She doesn't totally trust him, but can't deny her physical feelings for him. The problem is: Trevor has the scrolls and knows where the gold is; the really bad guys are after Trevor and think they can get to him through Jane.
The story includes several other characters, some in a surprising role, and has everyone trotting around Europe and the U.S. Will they get the bad guys before the blow the country apart? Do they really know who's who? There's enough action and some suspense. And, yes, there are a few unanswered questions for the next episode.