Charles Stross...injects...? (I was going to say throws, but that's somehow inadequate) more ideas into one's brain per page than any four other authors. His cautionary tale, following the vicissitudes of a remarkable 21st century family, across the centuries, and through the wormholes, spawning copies of themselves, backing up their various incarnations, and all the while being manipulated by a toy A.I. An A.I. whose intelligence has evolved as far beyond the human as human intelligence has beyond the tapeworm (Stross's analogy), while playing with forces that essentially put the continued existence of the species in doubt. Stross builds incredible worlds with amazing iterations of technology. But his story comes across as fragmented, by the lapses of time, and the vast leaps in technology. There's a beginning and an end, but the middle is a bit gooey. It's quite a ride, but at the end, you're still wondering where you've been.