Skies of Fire by Zoe Archer

Captain Christopher Redmond has just one weakness: the alluring spy who loved and left him years before . . . when he was still just a man. Now he's superhuman—a Man O' War, made as part of the British Navy's weapons program—and his responsibility is to protect the skies of Europe. If only he could forget Louisa Shaw.

Louisa, a British Naval Intelligence agent, has never left a job undone. But when her assignment is compromised, the one man who can help her complete her mission is also the only man ever to tempt her body and heart. As burning skies loom and passion ignites, Louisa and Christopher must slip behind enemy lines if they are to deliver a devastating strike against their foe . . . and still get out alive.