Charles Stross's Singularity Sky
This novel is an inventive, thoughtful adventure. It's dressed up like space opera, but is really an anarcho-political-evolution comedy about human colonization and the threats we might face -- the greatest being ourselves. This would be a laugh riot if made into a movie, but it is less so in the written word; still, it's a great pleasure and exciting romp. It has a bit of clumsy pacing and writing (for example, I noticed one passage switched perspective without changing scenes, Stross's usual narrative tactic), but it's a pleasure and a breath of fresh air. Good stuff!