This is actually a trilogy of three previously published books: "Storm of Wings", "Knighthood of the Dragon" and "The Last Battle".
Bunch's work can be described as military fantasy. The first two books read like a first World War novel with magic substituting for artillery and fledgling squadrons of dragons taking the role of untrusted bi-planes. A familiar theme is that of incompetent generals clinging to outmoded beliefs failing to grasp how new developments have changed war.
Good stuff. An enjoyable read.