The Bridge Beyond Her World by Brandon Barr is the second installment of the Song of the Worlds series.
This story picks up where the first book ends. I was not expecting as much sci-fi elements, but it actually worked quite well within the story. Such excellent storytelling, Brandon has given me a new appreciation for genre mixing. This is such a well thought out and executed tale that, I have to say, it is one of the best stories I have ever read.