Einar sat back in his seat and watched his reflection in the window. As the evening moved in quickly, the reflection grew more shadowy and angled, so that by dusk he didn't recognized his face in the glass. Then the reflection disappeared, and outside lay nothing but the distant twinkle of a pork village, and Einar was sitting in the dark. (19.12)
This is wonderful imagery from the author, David Ebershoff, equating Einar's reflection with the identity of Einar. He is traveling to Dresden to undergo surgery and become Lili forever, so he—and us, the readers—slowly watch his reflection fade into darkness. Is that a bad sign?