Gossamer Wing (Steam and Seduction, Bk. 1)

A SPY. AN AIRSHIP. AND A BROKEN HEART.
 
After losing her husband to a rogue French agent, Charlotte Moncrieffe wants to make her mark in international espionage. And what could be better for recovering secret long-lost documents from the Palais Garnier than her stealth dirigible, Gossamer Wing? Her spymaster father has one condition: He won’t send her to Paris without an ironclad cover.
 
Dexter Hardison prefers inventing to politics, but his title as Makesmith Baron and his formidable skills make him an ideal husband-imposter for Charlotte. And the unorthodox undercover arrangement would help him in his own field of discovery.
 
But from Charlotte and Dexter’s marriage of convenience comes a distraction—a passion that complicates an increasingly dangerous mission. For Charlotte, however, the thought of losing Dexter also opens her heart to a thrilling new future of love and adventure.