Description from the back of the book
Silent spacecraft take the light from the world, super-intelligent aliens rule with wisdom not force, a new era of invention and prosperity brings hope and peace...
The twilight of the human race has begun.
Book A - Good, has some signs of wear on the cover with an old creases and marks. The pages are slightly marked with age around the edges. - This is the version with the reworked first chapter (done in 1989).
Book B - Good, has signs of wear on the cover, creases on the spine and a line mark on the front cover.