So, finished Ian M Bank's "Feersum Endjinn", and it was a rather good read, and one that I'd /highly/ recommend you all read, as it very much fits the feel of SA.
Note : Like all truly good books, enjoyment of the novel doesn't require spoiler-freedom, but you'll get more enjoyment out the first read when you don't really know what's going on.
With that out of the way, SPOILER TIME!
Humanity went Diaspora some many, many years ago, and Earth went first voluntarily old-world, and then ended up doing a bit of a Cargo Cult. People kinda know what's going on, but not really. You get eight lives in reality, then you get eight lives in the "crypt", some combination infosphere/complete documentation of human history/afterlife/metaverse… thingy.
Here's the problem. Sol is heading into a nebula, and while it'll take a damn long while, life will get snuffed out as the nebula first blackens the sky and then causes a nova in Sol itself, the last vestiges of humanity die sublimed as their computer overheats next to the failed escape ship.
None of this you find out until essentially the end of the book, although you get your suspicions. Is it a nebula? Is it something else? For awhile there I was pretty convinced everything was on a super-construct rather than Earth, but nope, good old Earth it was.
N E WAYS, the other problem is that despite all the effort the original Old Worlders put into preventing it, the Crypt/Datacorpus is being taken over by the locally evolved AIs, etc,which is freaking everyone out, and as part of their original efforts they made sure the epically large survival systems were off and physically segregated from the rest of the system.
The story is then about the various people whose combined yet largely uncoordinated efforts get the systems turned on to prevent the "Encroachment" - IE, running into the nebula. The system? Stardrive - A feersum endjinn indeed!