The Wandering Robin - The Cerulean Airship, #3.5

A past as heavy as a ballast bag requires bold decisions for the future. Especially when the present becomes something to protect. Avery Hamilton sports a great deal of knowledge about airships, a charming smile, and a carefree demeanour. Plus a rather extensive collection of heavily guarded secrets that travelled with him from Sydney to London. Revealing them could mean losing not only his position as an assistant aeronaut, but also the woman who holds his heart.
Ivy Blackwell's interests revolve around her airship, her assignments, and her food. On top of that, having Avery around as her assistant comes as quite an adequate addition to her endeavours as an aeronaut - even if he's just an insufferable oaf who only knows how to tease her. Or so she tells herself. When a ghost from his past makes an unexpected appearance in London, Avery knows he must make a choice.
One that Ivy is set to prevent at all costs.