The Sky Below - The Flight of the Lady Firene, #1

A floating city. A pirate running from her past. A stolen trinket that could tear her world apart. Fleet and her brother Daryus have made a career out of stealing from other pirates. With their beloved airship and a loyal crew, they're unstoppable - until a raid goes wrong and they end up fleeing for their lives. Except there's nowhere for them to run. The city they call home has come under siege from within, and Fleet's at the heart of it all.
Soon, she's attracting the wrong sort of attention from every quarter: vengeful pirate captains, otherworldly wolves, her estranged husband - and the mysterious Shan, who knows more than he's letting on. If Fleet can't put things right, the new life she's built for herself will be destroyed, and it's going to take the whole city with it.