Roger MacBride Allen's Ring of Charon/Shattered Sphere books are pretty cool too - Earth (as in the whole planet) gets kidnapped after accidentally waking up an ancient artifact buried in the moon, and ends up at a sentient AI that runs a dyson sphere which is scared of what appears to be a sentient black hole coming its way. Meanwhile, the humans left behind in the solar system are trying to get the Earth back.
I wish he'd do the next book in the series, because it's bloody awesome.