Across The Sea Of Suns

Description for ACROSS THE SEA OF SUNS by Gregory Benford:

2056. Human and alien technology have propelled us into a new age of enlightenment. Moons are communities; miracles are made, not wanted upon; the vast goodness in mankind is stretched further -along with evil. as earth itself falls prey to attack, from deep within the blackness of space comes an alien message of astounding importance. It is a message revealing great wonders and terrifying danger. One man is about to encounter both.

This is #2 in Galactic Center Series.