"Until We All Share Joy" by Heather Wood

I've been wanting to try Heather Wood's books for a while now, and even have three of them on my TBR shelves!  Until We All Share Joy is a novella that takes place at the same time as another of her books, and now that I've met the main family she writes about, I'm looking forward to her other books even more!
Until We All Share Joy begins at Christmastime when a young medical student, Titan Dinsmore, spots a young lady sitting alone at a train station in Chicago.  Night is falling, and he knows ...