Code of the lifemaker

Science Fiction by James P. Hogan

Blurb

Code of the Lifemaker is a 1983 novel by science fiction author James P. Hogan. NASA's Advance Automation for Space Missions was the direct inspiration for this novel detailing first contact between Earth explorers and the Taloids, clanking replicators who have colonized Saturn's moon Titan.
A sequel titled The Immortality Option was published in 1995.