Landon, Kristin -- The Hidden Worlds

They're "hidden" because the runaway mind-controlling AIs are out there, having eaten Earth and most of the galaxy (or something). Only these few colonies remain. I didn't care much about or for this, and therefore don't really remember why, but it was probably a mix of "absurdly rigid and evil aristocracy of starship pilots" and "absurdly awful things happen to all the characters for the whole book" and "absurd love affair".

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