Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Vulcan''s Hammer is a 1960 science fiction novel by American writer Philip K. Dick.In 2029 CE, the Earth is run by the Unity organisation after a devastating world war. Unity runs the planet, controlling humans from childhood education onwards through the Vulcan series of artificial intelligences, but is fought by the Healer movement.Unity Director William Barris discovers that the Vulcan 3 computer has become sentient and is considering drastic action to combat what it sees as a threat to itself