The White Flower (Unabridged‪)‬

Rachel Rainsford should be excited. She was on a train traveling across the US to a well-paid position as an old lady's companion. But after several hours spent with the man who hired her and is accompanying her on her journey, she's having doubts. His manner seems strange, and she may have acted too hastily in accepting a job so far from home.

Meanwhile, in the parlor car, Chan Prescott overhears two men concocting a plan to abduct a young woman. When her name is mentioned, Chan recognizes it as the daughter of a former beloved teacher. Thus begins the daring escape that includes jumping off (and on) trains; wild car rides; a society house party; and the threat of incarceration in an insane asylum!

Grace Livingston Hill, well known for her Christian romances, was equally adept at thrilling suspense (see also her novel "The Red Signal").