Well, actually, I recommend anything in the “Honorverse” by David Weber. He’s developed a very full universe with a lot of interesting mil-sf stories and some really cool politics.
The Shadow of Saganami won’t be out until November, so put it on your wish list (I was lucky and got to read an early version). If you’re waiting and you haven’t yet read “Crown of Slaves”, you should do so. Although if you’ve never picked up an Honor Harrington book, you must start with “On Basilisk Station” and you’re not allowed to stop until you’ve finished the next book “The Honor of the Queen” (after that you’re sure to be hooked).