Music is such an integral part of inspiration.  I prefer to listen to non-lyrical music during the day, because I can let my mind wonder and go through it's own plots and conversations.  If I wasn't writing them down into a novel, I would think myself crazy.  But since I turn them into something, I guess I can consider myself sane enough.
Once in a while I'll hear a song that captures or embodies what I'm writing, to the point that it sums up the book in just that one song.
This song is it! 
My husband is a fan of this group, "Band of Horses".  He's been listening to them for a while, but not until I was listening to "Is There A Ghost" that it clicked with me--or Tess rather.