Natural History by Justina Robson
Robson's Natural History is an intriguing look into one possible future for our species. Though the title might be ironic, I think it contains multiple layers: Intelligence becomes its own force for evolution, transforming out of the natural world into something new but different... but doesn't intelligence arise from natural beings? I recommend this book with only minor hesitation, I think because it feels a bit cold or distant. Perhaps that's the best tone, though. Filled with memorable characters that develop the touching story.