Audiobook Title:
Convergence: The Heritage Universe, Book 4 (Unabridged)
By: Charles Sheffield

Now, after millions of years, a new Artifact has appeared - and previously discovered Artifacts are showing strange changes in their inexplicable activities. When a motley crew of human and alien scientists and adventurers set out to examine still more Artifacts, they should have considered the fact that some changes are more dangerous than others...