I'm not much of a reader anymore these days (I used to be when I was a young teenager), but I still do tend to like reading something every once in a while. When I do, I generally prefer books that can be read front to cover in one go—because that allows me to immerse myself into the book so much more.
John Scalzi's book is... interesting. It talks about a bunch of junior officers on a starship of the "Dub U" (short for "Universal Union"), which flies off into the galaxy to Do Things. This invariably involves away missions, and on these away missions invariably people die. The title is pretty much a dead giveaway; but in case you didn't guess, it's mainly the junior officers who die.
What I particularly liked about this book is that after the story pretty much wraps up, Scalzi doesn't actually let it end there. First there's a bit of a tie-in that has the book end up talking about itself; after that, there are three epilogues in which the author considers what this story would do to some of its smaller characters.
All in all, a good read, and something I would not hesitate to recommend.