The God Machine is a science-fiction novel by American writer Martin Caidin first published in 1968.

Rand survives an attempt on his life before he realizes that Project 79 has gained sentience and is trying to control the minds of humans and take over the world.

Assisted by a security agent and a mathematician, Rand sets out to destroy Project 79 before it is too late.

This early work by Caidin includes a discussion of bionics, the replacement of human body parts with machinery.

Caidin revisited this theme a few years later in his novel, Cyborg, which was eventually adapted into the 1970s television series The Six Million Dollar Man.