Ancillary Sword by Ann Leckie
"The sequel to Ancillary Justice, winner of the Hugo, Nebula, British Science Fiction, Locus and Arthur C. Clarke Awards. Breq is a soldier who used to be a warship. Once a weapon of conquest controlling thousands of minds, now she has only a single body and serves the emperor. With a new ship and a troublesome crew, Breq is ordered to go to the only place in the galaxy she would agree to go: to Athoek Station to protect the family of a lieutenant she once knew - a lieutenant she murdered in cold blood."
I actually had this book checked out since November and kept putting it on the back burner, partially because there were no holds and partially because I find it difficult to get invested in Leckie's books right away. But after the reader gets through the first few chapters the reader is engrossed in the world Leckie has created. I look forward to her next book which is due out later this year.