The conclusion to Scalzi's Interdependency trilogy, there's a lot going on for Emperor Grayland II. As ever more ambitious efforts to dethrone her abound, Grayland is left with few choices and fewer allies. 

Solid twists and turns, I loved getting more time with these characters, particularly because Scalzi's works that I'd read to date were standalones mostly. I'll likely be reading his other series very soon, as I enjoyed the way the plot and characters unfolded throughout this series!