Nightwings - Robert Silverberg A short and elegaic SF novel in the 'dying earth' tradition that follows the wanderings of a member of the Watcher's Guild as he looks to the stars in anticipation of a foretold alien invasion of Earth. His companions include a beautiful young 'Flyer' (the "Nightwings" of the title) and an enigmatic Changeling.

As the story unfolds we see great changes come over both the main character and the earth itself. I enjoyed this story for the tone it conveyed as well as the world & characters that were presented. Well worth picking up if you can find a copy.