Bonus posted:

Alastair Reynolds' Revelation Space universe is awesome, I really enjoyed all the books that are set in it (haven't read The Prefect yet) except for Absolution Gap. The end just fizzles out and the parts taking place on Hela drag out a bit sometimes, although it's much more character oriented than the previous books, which is really cool, because the characters are mostly interesting, especially Scorpio.
I really wish he had concluded the book by just having the shadows give them some technology with which to combat the Inhibitors or just coming in and destroying the Inhibitors themselves.