Reader's diggest: 2001, 2010, 2061 and 3001 by Arthur C. Clarke
2001: Aliens have left a monolith to monitor and help mankind's evolution towards intelligence.
2010: A second monolith transforms Jupiter into a mini-sun to help creatures on Europa in the same way.
2061: A third monolith on Europa is controlled to some extent by Dave / HAL.
3001: A resurrected member of the 2001 crew destroys the monoliths with a computer virus.
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