Since it's now been officially announced, DeCandido has finally be allowed to acknowledge he's been working on it (after keeping shtum when it started showing up online a couple of weeks ago). On his blog he specifies the full title as "The Klingon Art of War: Ancient Principles of Ruthless Honor. Precepts derived from the teachings of Kahless the Unforgettable, with modern commentary by K'Ratak, son of M'Lind, translated from the original Klingon by Keith R.A. DeCandido". K'Ratak is a Klingon writer that's been mentioned a few times.
The sample spread above is the from the start of the ninth precept described in the book, DeCandido mentions there are ten altogether.
Here's the blurb if you missed it before:
Klingons fight, but they do not merely fight. For Klingons, battle is a dance, a way of living with dignity and purpose. This is central to the concept at the heart of Klingondom: honor.
The Klingon Art of War lays out the principles of the Klingon code that animates their entire culture. Each chapter introduces another part of the Klingon ethic and explores the ways it informs Klingon life, behavior, and history. Each chapter also celebrates famous Klingons, warships, and battles, and the role they've played in advancing the Klingon Empire.