Quote:
The Neanderthal Parallax is a trilogy of novels by Robert J. Sawyer published by Tor. It depicts the effects of the opening of a connection between two alternate Earths: the world familiar to the reader, and another where Neanderthals became the dominant, sentient hominid. The societal, spiritual and technological differences between the two worlds form the focus of the story.
from wikipedia.
Found a sample chapter of this book while browsing in Amazon and its well written. Those interested in a little sci-fi what-if anthropology stuff should read it