My reception of this book is somewhat lukewarm, and that shows in my review.
Alex Benedict, an antiques trader who gets space sickness easily, is posthumously sent on a quest to uncharted parts of the galaxy by his now-deceased uncle. What he discovers on his quest threatens the founding myth of the galactic empire he lives in, interspecies relations to the only alien empire that is known to man, and the way space flight is done these days.
While this might be called a "galaxy-shattering plot" in the blurb on the book the publisher wrote, my own reaction to the book was more like: "Meh". The plot is nothing we haven't read before (again and again), the characters remain shallow and unconvincing, and the mysteries on the quest fail to intrigue me. In science fiction, the author can make up any mystery he pleases, and the reader is helpless in anticipating what alien races or technologies the author will invent to advance his plot. And that is fine as long as the author does not abuse this power to hide the fact that there is not really a plot but the protagonist just stumbles from one confrontation to the next.
I like space opera as much as every other nerd, but I also like some ideas, characters and plot development. "A Talent For War" seems as if it has been written according to a standard recipe. Unconvincing.