This one is the latest in the Honor Harrington series by David Weber. I'm sure I've said it before, but I love this series. It has that whole epic/military sci-fi/space opera thing going on.
There's a lot of rather... unconventional things going on in Honor's personal life, and of course being who she is that causes all kinds of drama. The scope of the military stuff becomes insanly huge, which kind of scares me as far as the future of the story goes. The numbers of people involved is rather overwhelming.
And of course I made it the end of the book when I was at work and only had a few pages left and only a few minutes until I had to put it down... and I was crying. The way Weber ends it is really beautiful, but incredibly heart-breaking at the same time.