Make Your Selection: The Red Lotus by Chris Bohjalian

Alexis and Austin are on a romantic trip in Vietnam -- a bike tour on which Austin can show Alexis his passion for cycling, and pay his respects to the place where his father and uncle fought in the war. But then Austin fails to return from a solo ride and Alexis, follows a path that leads her home to the very hospital where they met. That's when she starts to uncover a series of strange lies. Where did Austin go? Why did he really bring her to Vietnam? And how much danger has he left her in?