Honor among Enemies by David Weber (Honor Harrington 6)

Honor is recalled to duty to Manticore. She is given 4 heavy armed Q-ships to go on pirate patrol in the Silesian Confederacy. Giving her such a small command after being the second in command of the Grayson Navy is a political compromise to get her back in the Navy.

This time Lady Harrington meets Honor among enemies, because they all hate pirates more than each other. There is something bigger behind the staggering losses on Manticore merchants in the area …

I like the technobabble in this one, those Q-ships sound awful neat.