... Ancillary Justice by Ann Leckie
It's the first book of the Imperial Radch trilogy which also includes Ancillary Sword and Ancillary Mercy. So far Leckie's debut novel already won the BSFA Award for best novel and is also nominated for the Hugo and Nebula Awards which are awarded in May and August this year. (source)
"They made me kill thousands, but I only have one target now.
The Radch are conquerors to be feared - resist and they'll turn you into a 'corpse soldier' - one of an army of dead prisoners animated by a warship's AI mind. Whole planets are conquered by their own people.
The colossal warship called The Justice of Toren has been destroyed - but one ship-possessed soldier has escaped the devastation. Used to controlling thousands of hands, thousands of mouths, The Justice now has only two hands, and one mouth with which to tell her tale.
But one fragile, human body might just be enough to take revenge against those who destroyed her."(source)