by David Weber
Two irresistible forces are rushing together to crush Grayson between them. Only one woman--uncertain of her capabilities, weary unto death, and marked for murder--stands between her adopted planet and its devastation.
Oof - poor Honor! She can go head-to-head with Miles Vorkosigan for "put upon MilSF hero." She also seems to be the most successful reluctant duelist in literature.
I have to admit, I blip over a lot of the military engagement and royalty/government details - but I enjoy the series a lot. I really want to see the next Crown of Slaves book - even though it's out of sequence for where I am in reading the Honor books....