Firestorm (Destroyermen #6)
Can things get worse? For the crew of Walker and her allies, the only answer is yes. Now solidly engaged in a two front war against opponents that individually outnumber the entire alliance, the scope of this story continues to grow (my biggest concern is that every books seems to be making the scope bigger! There really doesn't appear to be an end in sight).
Now forced to stave off an attack by the Holy Dominion while simultaneously continuing to strike at the Grik, the story is steadly expanding to a global scope. The focus of this book is the expansion of air. Both by the HD with their trained attack flying Grik and by the Grik themselves with the introduction of Zeppelins developed by the Japanese cruisermen.
The best part is the Captain Reddy finally gets to be reunited with his love, even if just for a little while.