Nightwatch — Andrew M. Stephenson

The Golem Master - Dan Frome knew more than any living man about the Golems -- self-programming robots designed to "man" the Jupiter probe. He was not surprised to be drafted to Dvornik Moon base, site of the Jupiter launch. Once he was there, the picture changed drastically. There was no probe. But there was an alien spaceship driving in toward the Solar System even as, on Earth, mankind prepared to destroy itself in a final war. With hundreds of experts, Frome had been brought to Dvornik for Nightwatch, a supersecret program of defense. The Golems were to intercept the invader -- but Frome knew they could not. He knew all too well who would go out -- alone -- to meet the alien in the depths of space: Dan Frome