Virga: Cities of the Air (Sun of Suns, and Queen of Candesce), by Karl Schroeder
Steampunk-like far future world in a hollow-sphere setting (AKA Ringworld on steroids). Local politics intersect with an attempted takeover by the rest of the galaxy. I'm still trying to figure out how the natural resource economy works, especially for things like minerals.
Pirate Sun, by Karl Schroeder
Third in the above series.
Super Sad True Love Story, by Gary Shteyngart
Cryoburn, by Lois McMaster Bujold
Hugo nominee, via the Renovation Hugo nominees reading packet. This is my first encounter with Vorkosigan. I enjoyed it.